Task: Question Answering
Input (English): Question: Three machines operating independently, simultaneously, and at the same constant rate can fill a certain production order in 48 hours. If one additional machine were used under the same operating conditions, in how manyfewerhours of simultaneous operation could the production order be fulfilled?

 Option A: 6

 Option B: 9

 Option C: 12

 Option D: 27

 Option E: 48
Output (English): Option C