One of the major difficulties in determining the exact effects of maternal cocaine use on prenatal development is the fact that
A) the infants are typically stillborn.
B) cocaine use has dropped dramatically and mothers who used cocaine while pregnant are now hard to find.
C) the effects appear to involve changes in zygotic DNA structure and our ability to identify such changes is limited by technology.
D) pregnant mothers who are using cocaine are also often ingesting other harmful substances.

Question

Quizplus · Accepted Answer

The major difficulty in determining the exact effects of maternal cocaine use on prenatal development is that pregnant mothers who use cocaine often also ingest other harmful substances, making it hard to isolate the effects of cocaine alone.

One of the Major Difficulties in Determining the Exact Effects