Use of Opioid Drugs Such as Codeine and Heroin During

Use of opioid drugs such as codeine and heroin during pregnancy has been shown to have which of the following effects on the developing child?

A) moderate structural abnormalities to the child's heart and circulatory system
B) addiction, lower birth weight, preterm delivery, slower growth rate
C) genetic damage that will be passed on to the child's own offspring
D) no identifiable effects because neither drug crosses the placenta