The Selection of the Vice Presidential Nominee at the National

The selection of the vice presidential nominee at the national convention is based on the

A) results of the primaries and caucuses; the candidate who places second in these contests is nominated as the running mate of the candidate who finishes first.
B) convention delegates' judgment as to the candidate who would make the best vice president.
C) results of public opinion polls taken just before the convention begins.
D) presidential nominee's choice of a running mate.
E) None of these answers is correct.