Task: Question Answering
Input (English): Question: Life expectancy is defined by the formula 2SB/G, where S = shoe size, B = average monthly electric bill in dollars, and G = GMAT score. If Melvin's GMAT score is twice his monthly electric bill, and his life expectancy is 100, what is his shoe size?

 Option A: 100

 Option B: 55

 Option C: 85

 Option D: 40

 Option E: 50
Output (English): Option A