The correct answer is C because
Alexandria was built because its location was privileged since it was the center of commerce, culture and knowledge. This city was founded by Alexander the Great in 300 BC.
Alexandria had a huge library and a museum where ideas and knowledge were shared. It was called the first research institute in the world.
Alexandria was the largest city in the old, many foreigners came to live, trade and learn. Many merchants, scholars and tourists arrived at its ports.
I hope it help you.