Gopal has a bag that contains 3 red, 1 blue, 6 green and 2 yellow marbles. What fractional part of the bag of marbles is red?

• A.  \[\frac{1}{12}\]                                 
• B.  \[\frac{2}{12}\]
• C.  \[\frac{3}{12}\]         
• D.  \[\frac{6}{12}\]