Which of the following hereditary diseases involves multiple genetic mutations? a. complex b. chromosomal c. single-gene d. autoimmune

The right answer is complexe.

In complex genetic diseases it is a polygenic genetic determinism: many alterations in many genes are the multiple determinants of the disease. It is also referred to as "multifactorial" disease the monogenic genetic disease to a "simple" model (as opposed to "complex" genetic diseases).

i can't answer your question in very sad situation.

but if your situation is very bad, then you can find happiness by thinking about your past that has full of happiness.

or you should do meditation for some time to get rid off from that bad situation.

d. everyone should be treated fairly.