A bill was passed addressing various aspects of the opioid epidemic, including a new category of controlled substance for synthetic drugs. This bill also included opioids in the substance abuse program under Medicare and Medicaid.

Which of the following lists correctly orders the earth's layers from its innermost layer to its outermost layer? a. mantle, inner core, outer core, crust b. crust, inner core, outer core, mantle c. crust, mantle, outer core, inner core d. inner core, outer core, mantle, crust