A mother has given birth to an infant with cytomegalic inclusion disease; what does this indicate? ...

A mother has given birth to an infant with cytomegalic inclusion disease; what does this indicate?
 
  A. The infant is likely to have an abnormal chromosome karyotype.
  B. The mother has been previously infected with the cytomegalovirus (CMV), and the infection became activated during the pregnancy, or the mother acquired a CMV infection during her pregnancy.
  C. There is no risk of fetal injury or malformation, because the mother cannot transmit CMV to the fetus.
  D. The virus may have caused genetic abnormalities in the fetal chromosomes, which can be identified by laboratory tests.