The Pioneer 10 spacecraft was launched in March 1972 to explore the solar system. Pioneer 10 has continued on its journey and is now traveling beyond the solar system. Which statement best explains why Pioneer 10 continues to travel farther in space?

A: For every action force, there is an equal and opposite reaction force.
B: The force of the solar wind moves objects through space at a constant speed.
C: Objects in motion will remain in motion unless acted on by unbalanced forces.