I beleive the answer would be B: Buring fuel
-A: Inaccurate. Napoleon entered Italy in 1796 closer to the coast than the Alps. However, the mountains could be said to have protected his northern flank.
-B: True in 1940 against Germany in the Operation Sealion, But False in 1066 in the Invasion By William the Conquerer in the Battle of Hastings.
-C: Almost True. Corsica is in the Mediterranean Sea but isn't Small. it have a land area of about 8500 square kilometers and is the fourth largest
-D: Wrong. The objective was to return boundaries to the situation that existed before the Napoleonic Wars.
-E: Almost True, but don't forget Gibraltar
Answer: Most Native Americans shaped their environment with fire, employing slash-and-burn techniques to create grasslands for cultivation and to encourage the abundance of game animals. Native Americans domesticated fewer animals and cultivated plant life differently from their European counterparts, but did so quite intensively.
Explanation: sorry
Another way your question could be framed is “why do nations use imperialism on weaker countries?” and the simple answer is there are several motives such as ethnocentric purposes, religion, access to natural resources, expanding power, etc. Specifically people resort to imperialism on weaker countries because they are vulnerable to accept whatever helps the people survive in times of unrest.