C. It was a show of force that was caused by the creation of NATO.
Explanation:
The Warsaw Pact was created to be a show of force that was caused by the creation of NATO and the admission of West Germany into NATO.
NATO, or the North Atlantic Treaty Organization, was created in 1949. During the founding of NATO, twelve countries joined. The main reason for the creation of NATO was to stop the Soviet Union and communism as a whole, along with other reasons, but this one being the most prominent.
When West Germany was rebuilding and was finally going to be a part of the North Atlantic Treaty Organization (NATO), the Soviet Union realized they had to do something as well. This caused them to create the Warsaw Pact, with numerous other nations. They wanted to have a balance between the strengthing NATO, so they simply created their own organization.