When ______, this was the beginning of American involvement in Vietnam.
A、the United States decided to provide France with military aid in their fight in Vietnam
B、the United States started to provide aid for the South Vietnamese government after the Geneva Conference in 1854
C、the United States sent more and more military advisers to South Vietnam
D、the United States began to Americanize the war in Vietnam
【正确答案】：A
【题目解析】：本题考查越南战争。当美国决定为法国在越南的战斗提供军事援助时，这是美国介入越南的开始。
