The correct answer is A. No one would believe him.
Step-by-step explanation:
The excerpt presented from Amerigo Vespucci who was an Italian explorer mainly known for his explorations in the New World describes some of the elements Vespucci found in South America including trees, herbs, flowers and multiple animals such as hogs, goats, rabbits, and birds. In the case of birds Vespucci first states "What shall we say of the multitude of birds and their plumes and colours and singing and their numbers and their beauty?" to introduce there were multiple beautiful birds of different colors and features and then adds "I am unwilling to enlarge upon this description, because I doubt if I would be believed", this shows in South America Vespucci found so many beautiful and unique birds that he does not believe people would believe this and because of this he does not describe birds but continue describing other elements. Therefore, Vespucci hesitates to describe the birds in details because no one would believe him.