Client A will receive biological treatment and client B will receive psychotherapy. These two treatment types are part of the treatment approaches available in mental health field. Psychotherapy involves treating psychological disorders without prescribing medication. Biological treatment involves drug prescription.
A decrease attention span is not likely a result of regular activity. In fact, it would be the opposite way around.
The correct answer is A.
Q: But how, also, why?
A:

Formula to the solution should explain everything. ^
Vitamin D is used for absoring calcium. Calcium makes bones and teeth strong.
Im not sure about the answer