Sherri was worried that her son might be using drugs. She had observed him come home in a bad mood and come out of his room in a short time seeming euphoric. A while later, he was drowsy, sat around, and couldn't even concentrate on his favorite television show. The next day he stayed home from school with nausea, diarrhea, and stomach cramps. Sherri should be concerned because from these observations it appears her son might have taken _____ ecstasy. LSD. heroin. barbiturates.