It Is Recommended That Adults Consume 400 $\mu$ G (DFE) of Folate Daily

It is recommended that adults consume 400 $\mu$ g (DFE) of folate daily. How does this recommendation change when a woman becomes pregnant?

A) Increases to 500 $\mu$ g (DFE) of folate daily
B) Increases to 600 $\mu$ g (DFE) of folate daily
C) Increases to 700 $\mu$ g (DFE) of folate daily
D) Increases to 800 $\mu$ g (DFE) of folate daily