Answer:
The correct Answer is A) Stalin believed that security for the Soviet Union meant less security for others
Step-by-step explanation:
John Lewis Gaddis is a renowned Pulitzer Prize winning professor at Yale University teaching military and Navel history.
He believed that the Soviet Union's whole strategy was dependent on one person and what that person wanted alone. Unlike the United States with a representative Congress and military officers, the Soviet was a dictatorship and it was Stalin's belief that to secure Soviet Union's security, there needs to be trouble abroad.
That is why he further stated that the Cold War as started because of Stalin and if there was anyone else in power, other than him, things might have been different.