Real GDP in 2015 Is $10 Trillion

Real GDP in 2015 is $10 trillion. Between 2015 and 2016, using 2015 prices, GDP grew 3 percent and using 2016 prices real GDP grew 7 percent. Using the chain-weighted output index method, real GDP in 2016 is ________ trillion.

A) $10.5
B) $11
C) $10.1
D) $12.72