"A" would be the correct answer. Even though the main goal of the voyage was to find a different sea route to Asia. Bartolome and other Portuguese explorer have also made stops along the African coast and started to realize how could of an alternative they would be compared to the Mediterranean trade routes.
I'm positive with the answer tho
It was located in the middle of the Arabian Peninsula linking Yemen (which had major trading ports) and the Levant. It was also a pilgrimage site so there were always people there for worship which encouraged trade as well.
The Potsdam Conference was attended by the "Big Three": Joseph Stalin of the Soviet Union, Winston Churchill of Great Britain, and Harry S. Truman of the United States. These leaders had a sense that the war would soon end and the Allies would be victors, so the whole purpose of this conference was to plan what would happen after World War II ended. They discussed issues such as the German economy, punishment for war criminals (especially Nazis), as well as land boundaries and reparations.