During a sale, the original price of a garment is lowered by \(20\%.\) Because the garment did not sell, its sale price was reduced by \(10\%.\) The final price of the garment could have been obtained with a single discount by \(x\%\) from the original price, where \(x =\)
A. 25
B. 26
C. 27.5
D. 28
E. 30
Answer: D
Source: Princeton Review