Task: Question Answering
Input (English): Question: Some of 50%-intensity red paint is replaced with 25% solution of red paint such that the new paint intensity is 40%. What fraction of the original paint was replaced?

 Option A: 1/30

 Option B: 1/5

 Option C: 2/5

 Option D: 3/4

 Option E: 4/5
Output (English): Option C