Consumer magazine: Because front-loading washers use less water than top-loading washers, ordinary powder detergent does not dissolve readily in front-loading washers. So, to get clothes really clean in a front-loading machine you need to use a detergent fonnulated especially for front-loading washers, instead of ordinary powder detergent.
Which one of the following is an assumption required by the argument in the consumer magazine?
(A) All top-loading washing machines use the same amount of water.
(B) A laundry detergent formulated especially for front-loading washers dissolves more readily in them than it does in top-loading washers.
(C) A washing machine gets clothes really clean only with a laundry detergent specially formulated for that machine.
(D) A laundry detergent does not get clothes really clean in a washer unless it dissolves readily in it.
(E) Washers that use more water get clothes cleaner than those that use less
Source: LSAT
Kudos
Pre thinking : find a link between extent to which detergent gets dissolve in water and detergent's cleaning effect ...