20. (E)
Question type: Application
The argument explains why supermarkets are designed a specific way: it details the benefits the design has for the store owners, and the frustrations it causes in the customers. Answer choice (E) contains a principle that is well illustrated with this example: the owners manipulate the customers with the store design, and this causes unwelcome frustration for customers.
Notice that the author does not go as far as to say that this frustration causes customers to stop shopping, or is, in any way, bad for business.
(A) goes too far beyond the text.
(B) goes too far beyond the text.
(C) goes too far beyond the text.
(D) goes too far beyond the text.