Answer:
A. Mental health disorders occur because of a variety of factors.
Explanation:
Mental damage or psychological conditions are multifactorial, from the person's cognitive power, family history and possibly the perspective of lived experiences.
Random sampling means that members of a 'population' have equal chances of being selected. To carry out this type of sampling, you will need to use a table of random numbers.
A , D , C those are the answers to your questions
