Answer:
In babies born with congenital defects during the German measles rubella epidemic the specific cause of these birth defects was most likely the development of rubella virus infections in embryos.
Explanation:
Options for this question are:
<em>1. </em><em>The development of rubella virus infections in embryos.
</em>
<em>2. The failure of zygotes infected with rubella to
develop
</em>
<em>3. Mutations in the nerve cells of pregnant females at the time of the rubella epidemic
.</em>
<em>4. An increase in the amount of time needed for healthy embryonic development.</em>
Rubella is a viral infection caused by a virus of the genus Rubivirus, considered highly teratogenic during the phases of pregnancy where the embryo and the fetus are developing, that is, before 20 weeks of gestation.
<u>The virus is transferred to the embryo or fetus by the mother's blood, acquiring the disease</u>, which can cause abortions or visible malformations at birth, which is called <u>Congenital Rubella Syndrome</u> (CRB).
CRB is responsible for producing cardiovascular, renal, neurological malformations, loss of vision or hearing, problems that German children born during the epidemic probably had.
Learn more:
Congenytal rubella brainly.com/question/2107536
