Which of the Following Is True of the Options Available

Which of the following is true of the options available to a couple who are thinking about starting a family but who are concerned about passing onto their children genetic disorders which run in their family?

A) Adoption is probably the best option in order for the couple to be certain they do not pass on any disorders to their children.
B) Preventive genetic counseling can allow them to be tested for defective genes before they conceive a child.
C) Ethical controversies surrounding genetic counseling have made these procedures illegal in most states.
D) Most genetic disorders can be prevented through early detection.