Why was roudolfs nose red?

Rudolph's nose is red because it is richly supplied with red blood cells which help to protect it from freezing and to regulate brain temperature. Rudolph's nose is red because it is richly supplied with red blood cells which help to protect it from freezing and to regulate brain temperature.

Explanation:

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !