Julio’s persuasive speech contained the following statement: Shortages of prescription drugs have tripled between 2007 and 2014, according to the New York Times. In a survey of 214 doctors who regularly prescribe drugs for cancer patients, the New England Journal of Medicine reported that almost 83 percent couldn't prescribe their preferred chemotherapy drug sometime within the last six months. More than half of those doctors said they had to substitute a more expensive brand-name drug as a result. Which of the three basic issues of persuasive speeches on questions of policy did Julio address in this excerpt?