Assertion A: The nation state has always suffered from a limited capacity to deal with genuinely global problems.Reason R: The tragedy of the commons provides a compelling model of the consequences of this lack of capacity, pointing to the need for effective and democratic institutions of global governance.Codes:

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