Task: Question Answering
Input (English): Question: There is a total of 84 marbles in a box, each of which is red, green, blue, or white. If one marble is drawn from the box at random, the probability that it will be white is 1/4 and the probability that it will be green is 2/7. What is the probability that the marble will be either red or blue?

 Option A: 3/7

 Option B: 11/14

 Option C: 13/28

 Option D: 19/28

 Option E: 29/42
Output (English): Option C