What Is a Reasonable Conclusion as to How a Child

What is a reasonable conclusion as to how a child can be born with an abnormality to their thyroid gland and their digestive system?

A) During pregnancy the mother came into contact with a substance that caused developmental problems to the embryos endoderm layer.Disruption of the endoderm layer during embryonic development can lead to problems with the lining of the digestive and respiratory tract as well as the thyroid and parathyroid glands.
B) During pregnancy the mother came into contact with a substance that caused developmental problems to the embryos mesoderm layer.Disruption of the endoderm layer during embryonic development can lead to problems with the lining of the digestive and respiratory tract as well as the thyroid and parathyroid glands.
C) During pregnancy the mother came into contact with a substance that caused developmental problems to the embryos ectoderm layer.Disruption of the endoderm layer during embryonic development can lead to problems with the lining of the digestive and respiratory tract as well as the thyroid and parathyroid glands.
D) The sperm from the father contained an abnormal amount of human growth hormone that can lead to developmental problems with the embryo.
E) During delivery the child was exposed to the herpes virus that can lead to developmental problems associated with the thyroid as well as the digestive system.