During Pregnancy, How Does Malnutrition During Critical Periods of Development

During pregnancy, how does malnutrition during critical periods of development affect the fetus?

A) When the development of an organ is impaired, the damage is irreversible.
B) If the development of the heart is impaired in the early stages, it can be reversed if good nutrition is provided after the critical period.
C) Malnutrition does not affect the fetus but has adverse effects on the mother's health.
D) Malnutrition does not cause dental problems as teeth develop after the baby is born.
E) A surplus of nutrients taken after the critical period will make up for a deficit caused at any time during development.