SNRIs show a slight advantage over SSRIs because they influence ________ and ________.

A) norepinephrine; the genes that cause depression
B) norepinephrine; serotonin
C) serotonin and the genes that cause depression
D) behavior and relapse rates

SNRIs, or serotonin-norepinephrine reuptake inhibitors, influence both norepinephrine and serotonin levels in the brain, whereas SSRIs, or selective serotonin reuptake inhibitors, only affect serotonin levels. This slight advantage in affecting both neurotransmitters may lead to better outcomes in treating depression. The other choices are not accurate in describing the differences between SNRIs and SSRIs.