As Chief Executive, what are the three main powers of the President of
the U. S.?

the power to sign or veto legislation, command the armed forces, ask for the written opinion of their Cabinet, grant reprieves and pardons, and receive ambassadors.

d.he wanted to send diplomats to communist countries.

the three answers (for plato at least) are:

b-condemned sola fida 

d-set rules for establishing seminaries and for educating clerics in the seminaries 

f-recommended moderation in the sale of indulgences and banned the sale of false indulgences