Choose the correct answer for Assertion A and Reason R by using the code given below:Assertion A: American Cold Warriors embraced geopolitics as a basis for a national policy.Reason R: It was aimed at confronting the Soviet Union and International Communism by introducing politico strategic concepts as containment, domino theory, balance-of-power linkages and linchpin states.Codes:

• A. Both A and R are true, but R is not the correct explanation of A.
• B. Both A and R are true, and R is the correct explanation of A.
• C. A is true, but R is false.
• D. A is false, but R is true.