Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

The numerator of the GDP price deflator reflects:
Option A:the value of base year output at current prices.
Option B:the value of current year output at current prices.
Option C:the value of current year output at base year prices.

Answer: B