Official Explanation
The conclusion of the argument is that the government should educate the public about the dangers of inactivity and poor diet in order to stop the spread of type-2 diabetes. The basis for the claim is that inactivity and poor diet are the main factors in developing type-2 diabetes. We are asked to find a choice that will show that this plan likely will not work.
(A) The fact that schools educate middle school students about a disease that is generally "acquired in adulthood" does not address the effectiveness of an adult education plan sponsored by the government.
(B) The fact that the public already has access to this information through the Internet, does not say anything predictive about the effectiveness of the plan. Even with access to the information, there is a good chance that most people are not exposed to the information.
(C) Just because food companies encourage the public to indulge in unhealthful snacks, does not mean that a program that teaches them to do otherwise would not be successful.
(D) The fact that the government has not set aside money for such a program, does not say much about the projected program's effectiveness.
(E) CORRECT. Choice E states that healthful foods and exercise programs are beyond the financial means of many people. This suggests that even with the best planning, the program might not achieve its goals simply because people cannot afford to follow the program's advice.
Answer: E