Test Preparation on CAT Sentence Correction Guide

1.

A powder derived from the North American Echinacea flower which has beeneffective in preventing colds is grown by many small farmers out West.

To answer this question you first have to realize that the basic structure of thissentence is fairly simple. The main verb of the sentence is grown. What isgrown? A flower is grown not its derivative. Choices A B C and D all imply thatit is a derivative or a powder which is grown out West and not the flower. This isa clear flaw in logic. The only answer choice that has the correct subject is ChoiceE.
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