Drug use can cause the spread of diseases. true or false user: the cost of drug use for the public involves all the following except:
a. increase in healthcare costs
b. increase in law enforcement costs
c. decrease in prevention and treatment costs
d. all of the above

The correct answer is - true, and option C.

Explanation:

Drug use can cause the spread of disease as drug abuse by used syringe, needles and other medical or drug equipment can transmit the infection to the others.

The disease such as HIV.

The cost of drug use for the public increases the cost of the health care services and also increases the law enforcement cost to prevent it from drug abuse.  

Thus, the correct answer is - true, and option C.

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.