A growing drug abuse problem among U. S. adolescents and young adults is the increased illegal use of prescription medication. Referring to this graph, among those who reported receiving the medications from a friend, determine the most and least used sources the friend had for these prescription medications. Click the image to enlarge. most: bought or took them from a pharmacy; least: one doctor most: multiple doctors, least: drug dealer or stranger most: one doctor; least: Internet most: stranger; least: free from relative