You are working for a congressman who is on a committee that is examining whether or not to renew a drug policy that provides funding for local treatment centers. He has asked you to research whether or not the current policy is effective, so he can decide whether he wants to vote to continue the funding. Based on this unit”s readings, Discussion Board, and Seminar, address how you would explain to the congressman the difficulties in measuring the success of drug policies. This should be provided in 300″500 words and submitted to the Journal, titled Unit 7.