Pollutants, Such as Mercury, That Result from Industrial Production

Pollutants, such as mercury, that result from industrial production:

A) have not been shown to be causes of birth defects.
B) cause greater harm to pregnant women who are exposed than to their fetuses.
C) can cause birth defects when fetuses are exposed to them in high enough concentrations.
D) can cause stillbirths and spontaneous abortions but have no lasting effects on surviving babies.