Over the last thirty years, the growth of the number of arthritis sufferers in Country P has been slightly greater than the growth of country's population overall. However, a health clinic claims that the number of people suffering from some forms of arthritis has not increased. As evidence, the health clinic noted that people who suffer from rheumatoid arthritis now represent only 1 percent of the population, while thirty years ago rheumatoid arthritis sufferers represented almost 1.2 percent of the population.
Which of the following statements, if true, weakens the conclusion drawn by the health clinic?
(A) The number of people suffering from a form of arthritis other than rheumatoid arthritis has increased over the last fifty years.
Incorrect - Useless comparison(B) Over 80 percent of adults with rheumatoid arthritis contain an antibody called rheumatoid factor in the bloodstream.
Incorrect - Irrelevant to the argument(C) The prevalence of rheumatoid arthritis is much higher in the native population of Country P than it is among immigrants to Country P from other countries.
Incorrect - Irrelevant to the argument(D) Population growth in Country P has been such that 1 percent of the current population represents more people than 1.2 percent of the population did thirty years ago.
Correct - What this statement basically says is that now the absolute number of people having RA has increased(E) The number of women suffering from rheumatoid arthritis is more than double the number of men suffering from it.
Incorrect - Wrong comparison