I believe the answer is A. natural harbors provided a place to safely dock ships.
It is d proud because he is proud
The arrival of the U.S. troops in Europe. (I just learned about this in school)
He believed it was necessary to have cooperation and support from the international community:
"...not only do we seek the terrorists, but we also hold the governments that harbor them and feed them and house them and hide them, accountable for their behavior as well
Germany as after WWII the "Iron curtain" was dropped by western Europe in an attempt to staunch communism.