HELP!! Passage:
Escaping the pull of gravity and to travel at high speeds both affect the rate at which time passes.
which revision of the sentence uses parallel structure?

A. Escaping the pull of gravity and to travel at high speeds both affected the rate at which time passes.
B. Escaping the pulling of gravity and to travel at high speeds both affect the rate at which time passes.
C. Escaping the pull of gravity and travelling at high speeds both affect the rate at which time passes.
D. Escaping the pull of gravity and to travel at high speeds both affect the rate at which time passing.