Brian Is a 70-Year-Old Man Who Has Recently Been Diagnosed

Brian is a 70-year-old man who has recently been diagnosed with Alzheimer's Disease. Because Alzheimer's Disease has a genetic component, Brian is worried that his family is also at risk of developing the neurological disorder. As the disorder progresses Brian has a difficult time remembering details about his personal life or even recognizing his own son.
-In response to his disorder,Brian develops depression and his doctor prescribes an SSRI for him.This medication works by ________________.

A) increasing the overall production of serotonin
B) increasing the release of serotonin from the dendrites
C) blocking serotonin from leaving the synaptic cleft
D) blocking serotonin from being released by the pre-synaptic neurons