In my view this sentence is b. interrogative. Interrogative senteces are easy to define because they are usually a questions that asked to find out information. It could be confused with imperative as it looks like a request. But take attention that it is a question and polite request, so it is interrogative sentence as it is.
Answer:
1st Person P.O.V
Explanation:
It's obviously 1st person point of view because it say's a lot of I's and the narrators thoughts.
The answer for your question is B: Formal
In "The Prince," Machiavelli makes reference to making use of auxiliary armies, either allied or mercenary forces. He suggests that demanding extra forces to provide support to an own army is always risky. The reason is, in victory, the auxiliary army is owed a favor or might act against the party that hires it. Likewise, if the battle is lost, then the employer loses as well.