| 1. 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）
(E) irrigation and application of commercial fertilizer that were required by earlier high-yielding varietie
定语从句不是只能修饰紧接其前的先行词么？句子的意思是只有commercial fertilizer， required by earlier high-yielding warietie么？但是，我觉得原句好象是说两者都required by earlier high-yielding warietie | 
