Brand X laundry detergent sells for $2.00 a box. Brand Y sells for $4.

Brand X laundry detergent sells for $2.00 a box. Brand Y sells for $4.00 a box. Therefore, you will save money if you use Brand X laundry detergent instead of Brand Y.

Which one of the following, if true, would make the conclusion in the passage a logical conclusion?

(A) It takes only one cup of Brand X to do the work of one and one-half cups of Brand Y.

(B) A box of Brand X contains the same amount of laundry detergent as a box of Brand Y.

(C) A box of Brand X will clean just as many loads of laundry as a box of Brand Y.

(D) More than twice as many people use Brand X as use Brand Y.

(E) Brand X and Brand Y normally sell for $3.00 a box, but Brand X is on sale and Brand Y has been marked up.
 
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