Why Do Astronauts in Space Appear to Feel No Pull

Multiple Choice

Why do astronauts in space appear to feel no pull of gravity?

A) There is no gravity in space.
B) Gravity happens only when objects are accelerating.
C) In space, the gravity from the Moon and the Sun cancels out Earth's gravity.
D) They and their spaceship are both freely falling at the same rate in the gravitational field.
E) The astronauts do not have any mass when they are in space.