Selective Serotonin Reuptake Inhibitors (SSRIs) are a class of drugs that prevent the reuptake of serotonin. Based on this, which of the following statements is true regarding SSRIs?

• A. SSRIs stop neurotransmitters from drifting out of the synapse.
• B. SSRIs close the receptors on the postsynaptic neuron.
• C. SSRIs decrease the amount of time that serotonin is in the synapse.
• D. SSRIs increase the amount of time that serotonin is in the synapse.