Olympic Games are considered an important means of communication, ___________ people from different countries to gain a better understanding between each other.

A．He was from a poor family of Amerindian heritage.
B．He got lots of votes when he ran for President in 1995.
C．He once worked as a consultant at the Inter-American Development Bank.
D．He finished his education in the United States.

A．at 4,000°F, 5,000 feet below sea level
B．in the absence of oxygen
C．at 4,000°F, 5,000 feet above sea level
D．at the exact center of the earth at 4,000°F