Answer:
Argument A is cogent.
Explanation:
A cogent argument is sound one, and the premises provide a good reason to accept it.
This argument can be cogent even if someone doesn't find it convincing. This is an objective feature of the argument. In this example, J.F Kennedy's argument is true, and sound, and following that logic, one could say that the next part of the argument it's also true, because it's supported by the first part.
