What is the best inference that can be made concerning the movement of galaxies A, B, and C?
a. Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth.
b. Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth.
c. Galaxies A, B, and C are all moving toward Earth.
d. Galaxies A, B, and C are all moving away from Earth.
