Question: The decline of the mountain yellow-legged frog in the high reaches of the Sierra Nevada has become severe enough for the United States Fish and Wildlife Service quite possibly to list it as an endangered species in the near future.

(A) severe enough for the United States Fish and Wildlife Service quite possibly to list it
(B) severe enough so that the United States Fish and Wildlife Service could well list them
(C) severe enough for it quite possibly to be listed by the United States Fish and Wildlife Service
(D) so severe that the United States Fish and Wildlife Service could well list it
(E) so severe that they could well be listed by the United States Fish and Wildlife Service

Correct Answer: D
Explanation: The sentence is talking about two things. 1. The decline of frog. 2. The United States Fish and Wildlife Service could enlist the frog as an endangered species. These two things happen independently and the first one is not deliberately causing the second. So severe that the United States Fish and Wildlife Service could well list it- Correct. The pronoun it refers back to its logical antecedent "frog". Let’s examine the other options available.

Option A
severe enough for the United States Fish and Wildlife Service quite possibly to list it- Incorrect. This option alters the intended meaning. The intended meaning is that the United States Fish and Wildlife Service could list the frog as endangered because of the decline in its numbers. This option implies that the frog intended to be severe enough to be listed

Option B
severe enough so that the United States Fish and Wildlife Service could well list them- Incorrect. 1. Meaning issue 2. The pronoun "them" can’t refer back to frog as frog is singular

Option C
severe enough for it quite possibly to be listed by the United States Fish and Wildlife Service- Incorrect. Same meaning issue as in A. This option alters the intended meaning. The intended meaning is that the United States Fish and Wildlife Service could list the frog as endangered because of the decline in its numbers. This option implies that the frog intended to be severe enough to be listed

Option E
so severe that they could well be listed by the United States Fish and Wildlife Service- Incorrect. The pronoun "they" can’t refer back to frogs as frogs are singular.

“The decline of the mountain yellow-legged frog in the high”- is a GMAT sentence correction question. These sorts of questions come up with grammatical errors in the underlined part of the sentence. The candidates need to select the correct statement given in the options. The GMAT sentence correction section demands good skills in grammar since the candidate has to identify common grammatical errors. GMAT sentence correction is a part of GMAT verbal.

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