Why Do Some Stars in the Sky Appear Blue, While

Multiple Choice

Why do some stars in the sky appear blue, while other stars appear red?

A) The red stars are hotter on their surfaces than the blue stars.
B) The blue stars are hotter on their surfaces than the red stars.
C) The blue stars are closer to us than the red stars.
D) The red stars are closer to us than the blue stars.
E) The blue stars are moving away from us faster than the red stars.