Task: Question Answering
Input (English): Question: In Net's hair salon 45% of the customers dye their hair blond, 36% dye their eyebrows blond and 35% straighten their hair. 20% of the customers have none of these three procedures, while 12% take all of these three procedures. What percent of the customers come for exactly 2 of these 3 procedures?

 Option A: 5%

 Option B: 9%

 Option C: 12%

 Option D: 15%

 Option E: 21%
Output (English): Option C