Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: Question: The tax on a commodity is diminished by 20% and its consumption increased by 15%. The effect on revenue is?

 Option A: 9% decrease

 Option B: 8% decrease

 Option C: 6% decrease

 Option D: 1% decrease

 Option E: 2% decrease

Option B