The Caucasus Mountains are found between the Black and Caspian Seas.
I'd say the answer is D. Hope this helps :)
Ben's latest journey will take him from Tokyo to San Francisco, and is set to last for five months. That's 5,500 miles worth of swimming, the first-ever attempt by someone to cross the Pacific in this way. Ben will be swimming eight hours<span> a day at the average speed of two to two and a half knots per hour</span>
Most historians agree that the space race ended on 20 July 1969 when Neil Armstrong stepped onto the Moon for the first time. As the climax of space history and exploration, the lunar landing led to a triumph for the US.