The Bosporus Strait joins the Sea of Marmara to what other body of water?

A Mediterranean Sea
B Caspian Sea
C Black Sea

The 20-mile Bosporus connects the Sea of Marmara to the south to the Black Sea at its northern end. The Bosporus also divides Istanbul into two sides, the ‘European side’ and the ‘Asian side.’ Three suspension bridges span the Bosporus.

The correct answer is Black Sea.