When Abraham Lincoln was elected president, the southern states broke away and formed a new nation called ______.
A、the Southern States of America
B、the Federalist States of America
C、the Confederate States of America
D、the Anti-confederate States of America
【正确答案】：C
【题目解析】：当亚伯拉罕·林肯当选总统时，南方各州脱离联邦，成立了一个新的国家——美利坚联盟国。
