How Could the Availability of Genetic Screening and Then Therapies

How could the availability of genetic screening and then therapies lead to a society of genetic "haves" and "have nots"?

A) We would know who had good genes and who didn't, and only those with the good genes would reproduce.
B) Only those embryos which had defects that could be fixed would be allowed to develop to birth.
C) The people who could afford the technology could get their defective genes fixed, while most people could not afford to do that and would be viewed as "defective."
D) We could "design" all our children and they would end up viewing us as "defective."
E) Insurance companies could refuse health insurance to people with defective genes, so they would not live as long.