Why Is It That Environmental Teratogens May Be Even More

Multiple Choice

Why is it that environmental teratogens may be even more treacherous to deal with than, say, maternal illnesses or the use of drugs during pregnancy?

A) Because environmental teratogens are widely understood to be the most serious in their potential to damage unborn children.
B) Because environmental teratogens are, in fact, unavoidable.
C) Because people have given up trying to "live clean" and avoid exposure to environmental teratogens.
D) Because people are so often unaware of environmental teratogens in their surroundings.