___________，who found that his policy of appeasement of German aggression was no longer tenable，was forced to declare war on Germany on September 3， 1939.
A、Churchill
B、George VI
C、Chamberlain
D、ElizabethII
【正确答案】：C
【题目解析】：1939年9月1日德军入侵波兰，张伯伦发现他的绥靖政策已经站不住脚，被迫于9月3日对德宣战。
