क्योटो प्रोटोकॉल के तहत, विकसित देशों को पहली प्रतिबद्धता अवधि (2008-2012) के दौरान अपने ग्रीनहाउस गैस उत्सर्जन को 1990 के स्तर से औसतन कितने प्रतिशत कम करना आवश्यक था?

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): The terrorist attacks of September 11, 2001 (9/11) fundamentally impacted international security and reshaped US foreign policy. Reason (R): Globalization and modern technology have empowered non-state actors to wage asymmetric warfare across borders. Choose the correct option:

In which of his works did Kenneth Waltz construct the 'Levels of Analysis' framework for international relations?