I had the same question. It is not B it is D.
Answer:
The Greeks expanded throughout the Black Sea and south through the Red Sea.
Explanation:
Two of the most notable Mediterranean civilizations in classical antiquity were the Greek city states and the Phoenicians. The Greeks expanded throughout the Black Sea and south through the Red Sea. The Phoenicians spread through the western Mediterranean reaching North Africa and the Iberian Peninsula.
The answer to your question is B. However the troops were eventually withdrawn from Vietnam due to disagreements from the American people.