Which of the Following Environmental Chemicals Is Considered to Be

Multiple Choice

Which of the following environmental chemicals is considered to be a teratogen?

A) Mercury, as demonstrated in Japanese who ate contaminated fish.
B) Lead, as demonstrated in those exposed to automobile exhausts and lead-based paint.
C) PCBs, as demonstrated by those who used cooking oil that was contaminated with PCBs.
D) All of the alternatives are correct.