Vamshi 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. \[\frac{6}{12}\]