The answer is...
B. Buffers
Common anxiety disorders are: generalised anxiety disorder (GAD)panic disorder.obsessive-compulsive disorder (OCD)phobias.post-traumatic stress disorder (PTSD)
A- Always wear your seat belt! It could save your life!
He is most likely studying for pharmacotherapy since it is the study of medical treatment by means of drugs.
Pharmacokinetics studies hows the drugs move throughout the body. Both pharmacogenetics and pharacogenomics include the study of a person's genes.