The two correct answers regarding British Field Marshal Bernard Montgomery's contributions to the Allied war effort are:
- He defeated the Axis armies of Italy and Germany at El Alamein, Egypt.
- He defeated Benito Mussolini and fascist forces in Italy.
(Note: The first answer is a correct representation, but the second one you listed is repeated and is also not specific enough, as Montgomery was primarily focused on campaigns in North Africa and Western Europe rather than directly defeating Mussolini.)
Regarding the other options, Montgomery did not participate in the Battle of the Bulge, and he was not in command of naval forces during the D-Day invasion (that was Admiral Dwight D. Eisenhower's role).