Answer:
d. a memorial built in Washington D.C.
Explanation:
Vietnam Veterans Memorial is a national monument of the United States that is located in Washington D.C., and honors the members of the Armed Forces of the United States who served in the Vietnam War. It consists of 3 separate parts: the Statue of the Three Soldiers, the Monument to the Women of Vietnam and the Vietnam Veterans Memorial Wall, which is the best known part of this monument. It is popularly called Vietnam Memorial, the Vietnam Wall or the Wall.
The main part was completed in 1982 and is located in the Gardens of the Constitution, next to the National Mall, on the northeast side of the Lincoln Memorial. The National Park Service of the United States maintains the Vietnam Veterans Memorial, which receives about 3 million visitors a year.
