Which of the Following Statements Reflects How Exports and Imports

Multiple Choice

Which of the following statements reflects how exports and imports affect GDP?  

A)  Both imports and exports are added to a nation's GDP. 
B)  Both imports and exports are subtracted from a nation's GDP. 
C)  Imports are added to a nation's GDP; exports are subtracted. 
D)  Exports are added to a nation's GDP; imports are subtracted.