Manufacturers rate batteries in watt-hours; if they rate the watt-hour higher, the longer the battery can be expected to last.

(A) if they rate the watt-hour higher, the longer

(B) rating the watt-hour higher, it is that much longer

(C) the higher the watt-hour rating, the longer

(D) the higher the watt-hour rating, it is that much longer that

(E) when the watt-hour rating is higher, the longer it is

求解B为啥不对？