Philip Caputo wanted the romance of war, bayonet charges, and desperate battles against impossible odds during the Vietnam War. hilip Caputo imagined himself charging up a beachhead, like John Wayne in Sands of Iwo Jima (1949), and this led him to join the Marines to fight in Vietnam. Michael Herr commented on the performance of `grunts' when they knew that there was a camera crew nearby and how they imitated the stars of war movies. So powerful were cinematic images of battle that soldiers acted as though they were on the screen according to Herr.
C. Surroundings would be your answer. Heights can also be an answer, but they want the exact more direct answer, so C.
Hope this helps.
D because the plot always needs to be shown whether directly or indirectly