There are two bright stars in the constellation One of the stars appears red and the other star appears blue which of the following is the best explanation for the difference in the stars color ? A the blue star must be moving toward earth in red star away from earth
B The red star must be moving toward earth in the blue star away from earth
C The red star must have a greater surface temperature compared to the blue star
D that blue star must have a greater surface temperature compared to the red star