Marla is an architect who is designing a home for Chuck. Chuck is paying Marla $150 per hour to design his new home. When Chuck and Marla get married, Marla continues to work on designing the home, but she no longer charges Chuck for her work

As a result, GDP ________ because ________.
A) falls; Marla's architectural design services are no longer bought by Chuck once they're married
B) falls; Marla's work becomes less valuable once she's married
C) rises; Marla becomes more productive once she's married
D) falls; Marla's work takes place in the underground economy once she's married

A