Answer:
A. Battle of the bulge
Step-by-step explanation:
“For those who had lived through 1940, the picture was all too familiar. Belgian townspeople put away their Allied flags and brought out their swastikas,” the center writes. “Police in Paris enforced an all-night curfew. British veterans waited nervously to see how the Americans would react to a full-scale German offensive, and British generals quietly acted to safeguard the Meuse River's crossings. Even American civilians, who had thought final victory was near were sobered by the Nazi onslaught.”