What Was the Connection Between Humanism and Diplomacy

What was the connection between humanism and diplomacy?

A) Humanists were the best translators and were needed to compose treatises.
B) Since humanists began to fill most academic positions, they inevitably trained the future generation of political leaders.
C) The humanists had always displayed a keen interest in international studies; naturally they were drawn to international relations and diplomacy.
D) The new profession of ambassadors, essential to diplomacy, needed humanist skills to meet their job requirements.
E) The curricula for diplomatic studies and humanist studies were extremely similar.