Which fetal development occurs during the second trimester? bones begin to harden. the roof of the mouth forms. the eyes can sense changes in light. the heart and circulatory system begin to develop.

It gonna be C. From the time of conception, your baby will grow and change inside your uterus until he or she is born. Each trimester has a unique set of milestones. In the first trimester, your baby will grow from a fertilized egg into a moving fetus with eyes, ears, and working organs. In the second trimester, your baby’s features develop and you may be able to feel your baby move. In the third trimester, your baby will grow rapidly to get ready for birth.

B) The roof of the mouth forms

The answer above is incorrect on Edge. 2020/2021 health course.

i agree d is most definitely correct!