Critical Reasoning

Jim: The United States Mint has recently announced that it costs more to manufacture a penny or a nickel than the face value of each coin. In addition, there are very few items that can be purchased for a nickel, and virtually none that can be purchased for a penny. Since both the penny and the nickel no longer provide a necessary function in today's economy, I propose that the government eliminate them and declare the base unit of U.S. currency to be the dime.

Mary: Don't be silly. This would mean that all prices would round up to the nearest dime-nobody would want that. Congress would never approve, much less consider, such an unpopular measure.

In her response to Jim, Mary does all of the following EXCEPT
A. makes an assumption about the possible negative consequences of Jim's proposal
B. implies that a particular regulatory path is necessary to implement Jim's proposal
C. provides a reason why Jim's proposal would be difficult to implement, regardless of its potential benefits
D. assumes that Congress would consider the monetary benefits less important than public opinion of the proposal
E. attempts to undermine a premise upon which Jim bases his proposal

OA : E

Can someone please explain!