An astronomer is observing a star which puzzles her. The lines in the star's spectrum indicates that the star is very hot and should therefore be blue. But the star looks reddish in photographs and in measurements of the continuous spectrum. What is one possible explanation of this puzzle? Group of answer choices

this star is surrounded by an HII region

this star is in a local bubble, just like the Sun

this star must be located high above the disk of the Milky Way Galaxy

the star is no longer undergoing nuclear fusion inside

we are seeing the light of the star through layers of interstellar dust