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Federal government financing is an essential key in the survival of th

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Federal government financing is an essential key in the survival of th  [#permalink]

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New post 16 Jul 2018, 02:09
00:00
A
B
C
D
E

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Question Stats:

81% (00:28) correct 19% (00:44) wrong based on 98 sessions

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Federal government financing is an essential key in the survival of the interstate rail system.


A. an essential key in

B. an essential key for

C. essential for

D. essential in

E. essential
Spoiler: OA

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Re: Federal government financing is an essential key in the survival of th  [#permalink]

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New post 16 Jul 2018, 02:24
+1 for C.

A. an essential key in

B. an essential key for

C. essential for --> Correct, 'essential for' and not 'essential in'
e.g. :
A good strategy is essential for GMAT. Correct
A good strategy is essential in GMAT. Incorrect

D. essential in

E. essential

Hence, C.
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Re: Federal government financing is an essential key in the survival of th  [#permalink]

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New post 16 Jul 2018, 05:53
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Key itself means essential. Therefore, essential key is redundant. A and B are gone. The correct idiom is 'essential for.' Therefore D and E are gone. C is the correct
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Re: Federal government financing is an essential key in the survival of th  [#permalink]

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New post 16 Jul 2018, 11:37
Essential for is correct Idiomatic usage, with (C) as well.
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Re: Federal government financing is an essential key in the survival of th &nbs [#permalink] 16 Jul 2018, 11:37
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