Stimulants often cause a. drowsiness b. lethargy c. erratic and compulsive behavior d. increased muscle control

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.

the suction machine and tubing is the equipment that should be left behind and should be most easily accessible.