Which is the most important lesson that can be learned from the Persian Wars?

Question

A.
That Athens alone could have beaten Persia.

B.
That Persia was too powerful to ever defeat.

C.
That the Greek city-states should stay independent at all times.

D.
That a unified Greece could beat a larger army.
someone help ASAP is it D

Answer 1

yes, D

Answer 2

thank u