Final answer:
The best caption for a photo related to the Cuban Missile Crisis would be 'President John F. Kennedy listens to Soviet diplomats' as it highlights the critical negotiations during that time. so, option C is the correct answer.
Step-by-step explanation:
The Cuban Missile Crisis was a significant event in the Cold War, marked by a dramatic standoff between the United States and the Soviet Union over the installation of nuclear missiles in Cuba. The most helpful caption to include with a photo that signifies this event would most likely address the context and importance of the crisis. Therefore, the caption 'President John F. Kennedy listens to Soviet diplomats' (option c) would be the most helpful, as it gives an immediate historical reference to the tense negotiations that occurred during this pivotal moment.
The most helpful caption to include with the photo would be President John F. Kennedy listens to Soviet diplomats. This caption accurately reflects the context of the Cuban Missile Crisis and emphasizes the importance of Kennedy's diplomatic efforts in resolving the crisis and decreasing tension between the superpowers. It highlights Kennedy's role in successfully persuading the Soviets to remove the missiles from Cuba.