Federal government financing is an essential key in the survival of th : Sentence Correction (SC)

My Profile Logout

Test's Subscription Expires:

My Follow Feed Kudos My Error Log

Messages and Replies

Settings Mark All Read

See All

Applicant Notifications

Settings Mark All Read

See All

Global notifications

Settings Mark All Read

See All

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

Sort by Date

Sort by Kudos

Author

Message

TAGS:

Hide Tags

Math Expert

Joined: 02 Sep 2009

Posts: 51259

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

Show Tags

16 Jul 2018, 01:09

00:00

Difficulty:

5% (low)

Question Stats:

79% (00:29) correct

21% (00:47) wrong

based on 107 sessions

HideShow timer Statistics

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

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

request expert reply

SC Moderator

Joined: 30 Jan 2015

Posts: 672

Location: India

Concentration: Operations, Marketing

GPA: 3.5

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

Show Tags

16 Jul 2018, 01:24

+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.
_________________

The few, the fearless !

Thanks

Retired Moderator

Status: worked for Kaplan's associates, but now on my own, free and flying

Joined: 19 Feb 2007

Posts: 4567

Location: India

WE: Education (Education)

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

Show Tags

16 Jul 2018, 04:53

Top Contributor

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
_________________

you can know a lot about something and not really understand it."-- a quote
No one knows this better than a GMAT student does.
Narendran +9198845 44509