What Would You Tell a Woman Who Is Worried About

What would you tell a woman who is worried about exposure to environmental hazards during her pregnancy?

A) Environmental hazards include ultrasound and X-rays.
B) Environmental hazards include lead, mercury, PCBs, and radiation.
C) Environmental hazards lead to severe cognitive disabilities, but rarely physical deformations.
D) Environmental hazards are only a problem if the pregnant woman was exposed during the embryonic period of development.