"five-year-old trevor is emotionally disturbed and refuses to communicate with anyone. to get him to speak, his teacher initially gives him candy for any utterance, then only for a clearly spoken word, and finally only for a complete sentence. the teacher is using the method of"

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u. s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?