Using a Good Pair of Binoculars, You Observe a Section

Multiple Choice

Using a good pair of binoculars, you observe a section of the sky where there are stars of many different apparent brightnesses. You find one star that appears especially dim. This star looks dim because it is:

A) very far away
B) very low luminosity
C) radiating most of its energy in the infrared region of the spectrum
D) partly obscured by a cloud
E) it could be more than one of the above; there is no way to tell which answer is right by just looking at the star