The answer is <span>A. versatility</span>
It would be c. It can bond with other atoms through ionic and covenant bonds.<span />
Go to the Prenatal Testing page for more details. If one parent has sickle cell trait (HbAS) and the other has sickle cell anaemia (HbSS) there is a one in two(50%) chance that any given child will get sickle cell trait and a one in two chance that any given child will get sickle cell anaemia.