The answer is d, ty for the points
You typically want to stay with it for a few months (2-3) before you notice any kind of change in muscle mass, however is you are looking for weight changes, you could see changes anywhere from 1 month to 1 year. It depends on how consistent you are, and the amount/type of exercise you are doing in said program.
Answer:
the first response is a.
and the second response is c.