Shopping behavior @ Jerrod’s department store

[dominique.wang1]

Which of the following most logically completes the argument?
According to experts on shopping behavior, more shoppers would shop at Jerrod’s department store if they were offered the convenience of shopping carts. In fact, even if the amount spent by these additional customers only just covered the cost of providing the carts, providing carts would still probably increase Jerrod’s profits, since _______.
A. the layout of Jerrod’s is open enough to accommodate shopping carts comfortably
B. several department stores that compete with Jerrod’s have begun to make shopping carts available to their customers
C. there are some potential customers who would not be enticed to shop at Jerrod’s by the availability of shopping carts
D. stores that make shopping carts available to customers usually have to hire people to retrieve them from parking areas
E. a customer with a shopping cart buys more, on average, than a customer without a cart

This is a prep Q. The answer is E but I chose C because the question already mentioned that "if the amount spent by these additional customers only just covered the cost of providing the carts" & "additional customers," I think the right answer should talk about sth related to customers other than those additional customers. Please help to explain, thanks

[viveksharma247]

The question simply tries to ask what reason it could be for the departmental store's rise in profits due to the introduction of the shopping carts. Choice E provides the best explanation by saying that even if the number of customers would remain same, the customers would buy more than what they usually used to buy due to the introduction of the cart. Hence more profits and Choice E.

Choice C, on the other hand, weakens the argument all together by stating that a few customers would be lost due to the introduction of the shopping carts... which would certainly lower the profits rather than hiking them.

[chunyang.yu]

From the statement, we can know that the author predicts the profits of the department store will probably increase, while he or she aslo said in the statement that the profits gained from the additional customers can only offset the cost of providing carts, thus the increased profits must come from the usual customers

C is unrelated, since it only give out some other potential customers will not be attracted to Jerrod even the carts are available.

E is correct, because those usual customers will buy more product than before