Which of the following can be taken as the first paragraph of the Expository Essay on the topic of"Elections in USA"?（）
A、Every election is always different from another, but there is a thing that is the same for every election – it is the reason American people vote. Americans vote because they want their country to have a decent leader, a man that will do everything possible to promote their country position in the world’s politics in the first place. They cannot stay out of that, because every vote counts and they know it. There is also another reason American people vote, it especially concerns those, who are not good at observing what is going on in the Senate now. Such people usually vote by tradition without really getting into the essence of the deal.
B、The reason of its foundation was the difference in electing the president by popular vote and by Congress. Such things caused and still cause a lot of troubles during the elections. The Electoral College was called as a compromise between these two. Its structure is obviously well built. It consists of 538 electors. Each one goes for each of the 435 members of the House of Representatives and 100 Senators plus three for the District of Columbia. The number of electors is equal to of House members to which it is entitled. The electors are originally chosen by the political parties. During the elections each state gives the Governor prepares seven original Certificates of Ascertainment. A Certificate of Ascertainment is a list of these electors for the candidate that got the majority of the votes. Then the copies are sent to House of Congress. It is necessary to have 270 electoral votes to elect the President or Vice President. And the electors are not obligated to vote the same way as the majority of their state did. So the Electoral College runs in order to make the elections more objective.
C、It is more than just knowing the political party candidate when it comes to participating in the elections. Even in America, where the two party system exists it is still a problem to make people know whom they are voting for. This system has been used in the United States for a long time. Its roots lead to the very moment of the first ratification of the Constitution. At that moment two political parties were defined - the Federalist Party and the Anti-Federalist Party. Soon it became a tradition and it happened because this system was pretty good in use. It was easier for people to have only two options. So since 1895 the Republican and the Democratic parties became the major dominants in American politics. This system gives the opportunity to choose from only two candidates for President of the United States. This actually shows that this system in not probably the best when it comes to elections, but it is traditionally fixed. What it really does – it simplifies the process of voting. You either vote for the Republicans who are conservative, or for Democrats who are liberal. It has been historically proved that the appearance of the third party causes political splits like it happened when Theodore Roosevelt decided to form the Progressive party in 1912 but most of the time due to the in difference of the voters to them the other parties get no support. Talking about elections it is very important to point out the Electoral College.
D、\
【正确答案】：A
【题目解析】：由四个选项的首句可知，A选项是对话题的引出，C选项承接A选项的内容，B选项承接C选项的内容。所以A选项应该作为文章的首段。
