The GDP Deflator for Years Subsequent to the Base Year

The GDP deflator for years subsequent to the base year measures the change in

A) nominal GDP from the base year that cannot be attributable to a change in real GDP.
B) real GDP from the base year that cannot be attributable to a change in nominal GDP.
C) nominal GDP from the base year that cannot be attributable to a change in prices.
D) real GDP from the base year that cannot be attributable to a change in prices.