In a sense, yes. One must agree before you can start to disagree.
You must agree to:
1) The topic you guys are talking about. Two different topics discussed at the same time can lead to problems
2) The Facts: The facts are key in a discussion, and are generally used in debates and arguments. Each person must agree that what is stated is a fact.
3) You'll have to agree that there is a problem, and that a solution <em>can be found</em>. You are only disagreeing on how to get the solution.
A and B are both good answer but B makes more since because in the sentence it says Frugivores live near their food so they don’t have to fly far, also Frugivores eat bananas from trees and berries so (B) is the answer.