You cannot control health risks that result from
a. media.
b. heredity.
c. environment.
d. behavior.

I would say the best answer is option B "heredity." Heredity is genetic for example if a grandmother had cancer or had a high risk of getting cancer then she had a daughter, and that daughter had a daughter they both might also have the same genetics of the grandmother and both might have a high risk of getting cancer which is uncontrollable because you cannot control someones genetics.

Hope this helps.