The correct answer is D) The American people were against the Vietnam War, which persuaded Nixon to avoid a militaristic approach to Chinese relations.
During the 1960s and early 1970s, public sentiment in the U.S. turned increasingly against the Vietnam War, leading to widespread protests and a desire for a change in foreign policy. Nixon recognized that the American public was weary of military conflict and sought to improve relations with China as a way to enhance diplomatic credibility and move away from the war in Vietnam. His approach to China was characterized by diplomacy and engagement rather than military confrontation, reflecting the broader dissatisfaction with the Vietnam War among the American populace.