Constantinople is the major city in the eastern Roman Empire
In the beginning of the 1930's though the NAACP's legal Defence and education fund began to turn to the courts to try to make progress in over coming legally sanctioned discrimination from 1935 to 1938 the legal arm of the NAACP was headed by Charles Hamilton Houston
I'll first explain what the non-aggression pact was. It was an agreement that the Soviet Union and Germany would take no military action against each other. To answer your question it is B. The pact was to make sure he could safely attack Poland.