Question ID:PT29 S1 Q10 Passage:The symptoms of hepatitis A appear no earlier than 60 days after a person has been infected.  In a test of a hepatitis A vaccine, 50 people received the vaccine and 50 people received a harmless placebo.  Although some people from each group eventually exhibited symptoms of hepatitis A, the vaccine as used in the test is completely effective in preventing infection with the hepatitis A virus. Stem:Which one of the following, if true, most helps resolve the apparent discrepancy in the information above? Correct Answer Choice:DChoice A:The placebo did not produce any side effects that resembled any of the symptoms of hepatitis A. Choice B:More members of the group that had received the placebo recognized their symptoms as symptoms of hepatitis A than did members of the group that had received the vaccine. Choice C:The people who received the placebo were in better overall physical condition than were the people who received the vaccine. Choice D:The vaccinated people who exhibited symptoms of hepatitis A were infected with the hepatitis A virus before being vaccinated. Choice E:Of the people who developed symptoms of hepatitis A, those who received the vaccine recovered more quickly, on average, than those who did not.