请教大神们，这句话，“The success of this strategy relies on the assumption that supermarkets will pass on all of the savings by lowering the prices they charge consumers for themanufacturer's cereals.” 什么意思啊？什么saving, pass on to whom?? 虽然隐约理解D是正确选项，但这个弯还是转不过来。。求教！
Which of the following most logically completes the passage below?
One name-brand cereal manufacturer is about to reduce wholesale prices for its cereals by 20 percent becauseconsumers have been switching from its cereals to cheaper store brands. The success of this strategy relies on theassumption that supermarkets will pass on all of the savings by lowering the prices they charge consumers for themanufacturer's cereals. Although supermarkets usually pass on such savings, in this case it is likely thatsupermarkets not do so because________________.
several other name-brand cereal manufacturers are about to reduce the wholesale prices of their cereals
the average price per box of name-brand cereals has increased significantly in the last 10 years
total annual sales of cereal—including both name-brand and store-brand cereals—have increased over the past10 years
supermarkets make far more profit on sales of store-brand cereals than on sales of name-brand cereals
the current prices of the manufacturer's cereals are comparable to the prices of name-brand cereals produced byother cereal manufacturers