OG10-128 当出现A and B that 怎样判断定语从句中的that是指代前面的单个名词B 还是指代A and B,请各位看官不吝赐教,勇于拍砖

128. New hardy varieties of rice show promise of pro­ducing high yields without the costly requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties.

(A)  requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties

(B)   requirements by earlier high-yielding varieties of application of commercial fertilizer and irrigation

(C)  requirements for application of commercial fertilizer and irrigation of earlier high-yielding varieties

(D)  application of commercial fertilizer and irriga­tion that was required by earlier high-yielding varieties

(E)   irrigation and application of commercial fertil­izer that were required by earlier high-yielding varieties

OG10的解释

Choice E, the best answer, clearly and grammatically expresses the idea that two costly procedures, irrigation and the applica­tion of... fertilizer, were required by earlier high-yielding varieties of rice. In A, the placement of by earlier... varieties immediately after application of fertilizer suggests that the varieties applied the fertilizer. In B and D, the phrase applica­tion of... fertilizer and irrigation is ambiguous in meaning: it cannot be clearly determined whether applying fertilizer and irrigating are a single operation or two distinct operations. In C, only irrigation--not both irrigation and fertilization--is clearly associated with the earlier... varieties of rice.

从逻辑意思是可以看出来应该指代  irrigation and application of commercial fertil­izer 但是作题过程中很容易习惯的看成修饰前面的application of commercial fertil­izer ,有没有除了逻辑意思之外的更简洁的判断方法,请各位大侠赐教