In the context of the study conducted by lewchuk et al. (2016) on the social and economic effects of precarious employment in the greater toronto-hamilton area, which of the following statements is true of low earnings and economic uncertainty?

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?