Special Relativity Tells Us That

Special relativity tells us that

A) the speed of light is variable.
B) light moves faster if emitted by a source moving in the direction of emission.
C) light moves faster if emitted by a source moving in the direction of emission and light moves slower if emitted by a source moving in the direction opposite the emission.
D) light moves slower if emitted by a source moving in the direction opposite the emission.
E) light moves at the same speed independent of the motion of the source.