Task: Question Answering
Input (English): Question: There are 21 balls in a jar: 14 red, 4 blue and 3 green. If a single ball is drawn from the jar, what is the probability of that it is either blue or red?

 Option A: 1/12

 Option B: 3/4

 Option C: 6/9

 Option D: 6/7

 Option E: 3/4
Output (English): Option D