“Hitler knows that he will have to break us . . . or lose the war. If we can stand up to him, all Europe may be freed."

Based on the information given, the words above were most likely spoken by
a
Winston Churchill after the Dunkirk evacuation.
b
Neville Chamberlain after signing the Munich Pact.
c
Franklin Roosevelt after the bombing of Pearl Harbor.
d
Dwight Eisenhower before D-Day.