Until Spring 1943,perhaps Hitler's Greatest Opportunities of Defeating Britain and Winning

Until spring 1943,perhaps Hitler's greatest opportunities of defeating Britain and winning the war was

A) the possibility of a successful invasion across the English Channel.
B) that German U-boat would destroy Allied shipping.
C) the defeatism of pro-fascist elements within upper-class British society.
D) that General Rommel would conquer Egypt and the Suez Canal.
E) that the American-British-Soviet alliance would collapse.