It is most likely because he believed that they could cause unnecessary conflict... that is just my educated guess
Answer:
The answer is A, Despite controlling the roads and railways into Berlin, the Soviets were unable to stop the Americans from helping West Berlin.
Explanation:
As shown in the cartoon the road is blocked and the two men have road and railroad control but the air control is not stopping the trail of planes from passing them.
By this quote he was trying to tell that the issue of peace is everyone’s concern. It is their duty to help others if they expect the same kind of help in the future.