Hubble's Law Tells Us That

Hubble's law tells us that

A) the distance to other galaxies can be measured by calculating the blue shift of the light we receive from them.
B) the rate at which a galaxy recedes from the Earth is proportional to the square of the distance from the Earth.
C) the rate at which a galaxy advances toward the Earth is proportional to its distance from the Earth.
D) the distance to other galaxies can be measured by calculating the red shift of the light we receive from them.
E) the rate at which a galaxy moves is the Hubble constant.