Task: Question Answering
Input (English): Question: In a college, 70 percent of students study math, 75 percent of students study English, 85 percent study French and 80 percent study German.
Can you find out the percentage of students who study all 4 subjects ?

 Option A: 12%

 Option B: 10%

 Option C: 16%

 Option D: 18%

 Option E: 19%
Output (English): Option B