Answer: (c) Both statements 1 and 2
Explanation: The Pentagon says that the Russian Su-27s intercepted the surveillance drone in international airspace, while the Russian Defence Ministry claims its jets were scrambled after a U.S. drone violated its "temporary airspace" off the Crimean peninsula. Therefore, both statements 1 and 2 are correct. The U.S. does not have a naval presence in the Black Sea, and the article states that the U.S. and Russia already have a deconfliction hotline to avoid mid-air collisions in different theatres where they operate, including Ukraine.