According to context clues, which best defines the underlined words?
Read the passage about space, then answer the question.

Scientists discovered the asteroid belt, an area of the solar system between Mars and Jupiter, where the greatest number of asteroid orbits can be found.

A. a piece of clothing to be worn in space travel
B. an asteroid that is found on Jupiter
C. a region where many asteroids are located
D. a great number of asteroids in one place