Task: Question Answering
Input (English): Question: A dishonest grocer professes to sell pure butter at cost price, but he mixes it with adulterated fat and thereby gains 35%. Find the percentage of adulterated fat in the mixture assuming that adulterated fat is freely available?

 Option A: 20%

 Option B: 25%

 Option C: 33.33%

 Option D: 40%

 Option E: 30%
Output (English): Option E