Answer:
Serotonin reuptake inhibitors, option B
Step-by-step explanation:
Selective serotonin reuptake inhibitors, also known as SSRIs, are a class of medications that block the patient's central nervous system (CNS) from reuptaking the neurotransmitter serotonin, which is responsible for regulating mood, sleep, the perception of reward, memory, and more. Low levels of serotonin, amongst other neurotransmitters, is thought to be a characteristic feature of many depressive disorders and conditions in which depression can be associated, like post-traumatic stress disorder and schizophrenia. Too much serotonin, however, can also be a problem; a condition called serotonin syndrome can occur when there are high levels of this neurotransmitter, resulting in signs and symptoms like agitation, restlessness, hallucinations, elevated heart rate (tachycardia), labile blood pressure, and nausea, vomiting, and diarrhea. So healthcare providers, the patient themselves, and the people around the patient must monitor for these symptoms when they are on these medications.
Beta blockers are a class of antihypertensive medication. Corticosteroids have a few different indications, such as anti-inflammation and adjunct management of chronic asthma and COPD, but depression is not included in these treatments. Antihistamines, like diphenhydramine (brand name Benadryl or Zzzquil), are used as both sleep aids and treatments for allergic reactions and hypersensitivity.
Thus, of these choices the drug therapy used in the treatment of depression is serotonin reuptake inhibitors, option B.