When in Total Lunar Eclipse,the Moon Shows a Reddish Color

When in total lunar eclipse,the Moon shows a reddish color because

A) light from the northern and southern lights,the aurora,on Earth,which is predominantly red,illuminates the Moon.
B) most of the sunlight that passes through the atmosphere is scattered,especially the blue wavelengths,and what passes through is mainly red in color and falls onto the Moon.
C) the Moon is illuminated only by the residual glow from the dark side of Earth,which is predominantly red.
D) this is the color of the residual thermal glow from a still-warm Moon after the abrupt removal of the heat of the Sun.