Light That Is Emitted by an Object near a Black

Multiple Choice

Light that is emitted by an object near a black hole is redshifted because

A) the photons are moving away from us very quickly as they are sucked into the black hole.
B) the photons are moving increasingly faster in order to escape the pull of the black hole.
C) photons must "borrow" energy in order to escape the black hole.
D) the object is heating up due to gravitational tidal forces.
E) of gravitational time dilation.