Evidence That Serotonergic Abnormalities May Be Involved in Sudden Infant

Evidence that serotonergic abnormalities may be involved in sudden infant death syndrome (SIDS) comes from studies showing that

A) the incidence of SIDS decreases if infants are given SSRIs.
B) response to a CO₂ challenge in mutant mice lacking central serotonin can be improved by treatment with DOI.
C) apnea in mutant mice lacking central serotonin can be reversed with SSRIs.
D) infants who died of SIDS had a reduced number of 5-HT_2A receptors in their brain.