In their 1943 meeting at casablanca, allied leaders decided to invade
a. italy.
b. france.
c. germany.
d. north africa.

The correct answer is A. Italy. This preceded operation overlord which happened in 1944. Italy was invaded earlier, most accurately Sicily. The locals often worked together with the US forces. A high number of troops was also US citizens of Italian heritage who could communicate with people there and some of them even knew the terrain and the cities which made it easier.

C. the delegated powers