The Sun Exerts a Gravitational Pull on Earth

The Sun exerts a gravitational pull on Earth.Why doesn't Earth fall into the Sun?

A) Earth is moving across the Earth-Sun direction, so Earth is pulled around in a circle.
B) Earth also exerts a gravitational pull on the Sun that is equal and opposite to the pull it feels from the Sun.
C) Earth and the Sun are kept apart by the interactions of their magnetic fields.
D) Retrograde motion counteracts the gravitational pull and keeps Earth from falling into the Sun.