Jim: A new company specializing in home exercise equipment is charging up to $2,500 for fancy treadmills featuring built-in entertainment systems and heart monitors. The marketing materials for these expensive machines claim that, with regular use, they can help people lose weight, eliminate stress and reduce the risk of heart disease. However, there is no indication that running on even the most advanced treadmill offers any health benefits that running on a track does not. Save your money. If you want to become more fit, go jogging outside.
Which of the following, if true, most calls into question Jim's argument?
A. Most people are more inclined to exercise on a state-of-the-art treadmill because it is more convenient and enjoyable than running outside.
B. Running on a treadmill can be less beneficial than running outside, which requires the use of a broader range of muscles to maintain pace and balance.
C. To most people who would be interested in buying a treadmill for their homes, $2,500 is not a major expense.
D. Jim was a member of a panel that conducted extensive evaluations of all of the leading treadmills currently on the market.
E. Studies show that devices that use electrical currents to simulate exertion are considerably less effective than traditional forms of exercise, such as push-ups and weightlifting, in promoting the development of muscle mass.
For choice C, since most people who are interested in buying a treadmill for their homes, and they don't think money is a major expense. This actually weakens the conclusion"Save your money." Even though it doesn't really mention about the money value in the argument, but it also weakens the conclusion. Why C is not the answer? Also, what if there is no answer A, then would C most likely can be true for this question?