The Nurse Is Instructing a Client Who Is at 10

The nurse is instructing a client who is at 10 weeks' gestation on avoiding substance abuse. Which is the rationale for why substances of abuse should be avoided during pregnancy?

A) Interferes with hormone excretion of the fetus
B) Facilitates the transfer of viruses and other diseases into the developing fetus
C) Passes into the developing fetus through the placenta very easily
D) Stops the synthesis of protein in the developing fetus