In Computing GDP,market Prices Are Used to Value Final Goods

In computing GDP,market prices are used to value final goods and services because

A) market prices reflect the values of goods and services.
B) market prices do not change much over time, so it is easy to make comparisons between years.
C) if market prices are out of line with how people value goods, the government sets price ceilings and price floors.
D) None of the above is correct; market prices are not used in computing GDP.