Answer:
C) The winner of this grueling race, covering more than a thousand miles, becomes famous!
Explanation:
The statement uses the adjective grueling to describe the race, which means very tiresome. It also adds that the race is over a thousand miles, which is a very great distance.
C. It furthers physicists understanding of the universe
Answer:
the correct sentence is the boy is happy with his car
Answer:
maybe A
if this is wrong then sorry