In order to function, some kinetic watches rely on a tiny weight and a

Question

Project SC Butler: Sentence Correction (SC2) 
 For SC butler Questions  Click Here

In order to function, some kinetic watches rely on a tiny weight and a generator that responds to the motion of the wearer’s  wrist, creating more current with long, sweeping movements and fewer  with small ones.

A) wrist, creating more current with long, sweeping movements and fewer

B) wrist, which creates more current with long, sweeping movements and less

C) wrist, creating more current with long, sweeping movements and less

D) wrist and create more current with long, sweeping movements and fewer

E) wrist and that create more current with long, sweeping movements and fewer

generis · Accepted Answer

OFFICIAL EXPLANATION

Project SC Butler: Sentence Correction (SC2) 
 For SC butler Questions  Click Here

THE PROMPT

THE OPTIONS  
 
• wrong adjective:  fewer  should be  less 
→ in this context, in which something similar or identical to electrical current is at issue, the noun  current  is a non-count noun.
→ there is no such thing as  fewer current  in the context of the flow of electricity or power.

(Be careful. When "current" refers to ripples in a body of water, such as ocean currents, or a course of events, such as currents of public opinion, the noun is countable and you should use  fewer —but then you would say  fewer currents   . See MacMillan online dictionary,  here .)

ELIMINATE A

•  which  is ambiguous
→ does  which  refer to  wrist ,  movements , or even  generator ?

→ To avoid pronoun ambiguity, there must be only one logically possible antecedent.
You will almost never see me eliminate an option on the basis of pronoun ambiguity on the first pass.
I think that the sentence is not clear, but I will keep it tentatively, hold my nose, and look for a better answer.
KEEP (until, I hope, I find a better answer)

• I do not see any errors, and better yet, I see that option C is much clearer than option B. 
Eliminate option B.

• GMAC tests frequently these two issues against each other: 
COMMA + WHICH 
and 
COMMA + PRESENT PARTICIPLE (verbING)
The issue with  which  is sometimes slightly different from its problem here (ambiguity); in many official questions, no stated noun exists to act as an antecedent for which.
Whether we have too many logical antecedents or none at all, GMAC is very strict about the fact that  which  must refer to a clearly stated noun (and that noun does not always have to be the immediately preceding word).

•  creating  modifies the previous clause. 
If you want to be more specific, the COMMA + CREATING phrase gives you the result or outcome of what one of the subjects does in the previous clause.

•  less  current is correct
KEEP

• subject/verb error: singular generator should take singular verb  creates 
 Correct:  . . . a generator  that responds  to the motion of the wearer’s and    creates 
 Wrong:  . . . responds . . . and create . . .

• wrong adjective, as is the case in option A:  fewer (current ) should be   less  current

• almost certainly, a second  that  is required
The generator does two things. If the first one is described with a that-clause, the second thing should also be described by a that clause. Whether to repeat the word  that  on the GMAT does not have a straightforward answer. Try to find another error. (We found two others.)
ELIMINATE D

• subject/verb disagreement: just as in option D, singular  generator  should not be paired with plural verb  create

• wrong adjective: as in option A,  fewer  should be  less 
ELIMINATE E

The correct answer is C.

Comments

I am always glad to see a mix of styles in these answer explanations, because people absorb information differently, and each poster here is likely to strike a chord with certain kinds of thinkers.

In other words, the more explanations, the merrier.
(Aspirants? You have a standing invitation to post.)

Keep up the hard work. Kudos to all.

ElninoEffect · Answer

A) wrist, creating more current with long, sweeping movements and  fewer 
 current is not countable so use of fewer is wrong here.

B) wrist,  which  creates more current with long, sweeping movements and less
 Use of which here suggests wrist creates more current - Wrong
It's the motion of the wrist that creates current.

C) wrist,  creating  more current with long, sweeping movements and  less 
 Everything is good here.

D) wrist  and  create more current with long, sweeping movements and  fewer 
 Use of and changes the meaning from as a result creating more current... to presenting a list of actions. + use of fewer is wrong here.

E) wrist  and  that create more current with long, sweeping movements and  fewer 
 Same as D

zhanbo · Answer

My answer is  (C) . It took me 01:01.

(A) "current" is uncountable noun. Use "less energy" as opposed to "fewer energy".
(B) "which" refers to "wrist", but wrist cannot create current. 
(C) Fixed the issue in (A).
(DE) See (A).

karnavora1 · Answer

In order to function, some kinetic watches rely on a tiny weight and a generator that responds to the motion of the wearer’s wrist, creating more current with long, sweeping movements and fewer with small ones.

We need to use "less" and not "fewer" since we are talking about current, hence A,D and E are out.
Between B and C, the correct answer is C because the kinetic watch is creating the current and not the wrist.
Since "which" is placed next to wrist, B is wrong.

A) wrist, creating more current with long, sweeping movements and fewer
   Incorrect - Uses Fewer

B) wrist, which creates more current with long, sweeping movements and less
   Incorrect - Uses which

C) wrist, creating more current with long, sweeping movements and less
   Correct - Uses less and creating

D) wrist and create more current with long, sweeping movements and fewer
   Incorrect - Uses Fewer

E) wrist and that create more current with long, sweeping movements and fewer
   Incorrect - Uses Fewer

winterschool · Answer

In order to function, some kinetic watches rely on a tiny weight and a generator that responds to the motion of the wearer’s wrist, creating more current with long, sweeping movements and fewer with small ones.

A) wrist, creating more current with long, sweeping movements and  fewer   Incorrect

current is uncountable, so fewer should be less

B) wrist,  which  creates more current with long, sweeping movements and less  Incorrect

modifier issue - which modifies wrist that changes intended meaning and is illogical

C)  wrist, creating more current with long, sweeping movements and less   Correct

D) wrist and create more current with long, sweeping movements and  fewer   Incorrect

current is uncountable, so fewer should be less

E) wrist and that create more current with long, sweeping movements and  fewer   Incorrect

same as D

generis · Answer

The official explanation is  here .

VerbalBot · Answer

Automated notice from GMAT Club VerbalBot: 

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

 This post was generated automatically.

In order to function, some kinetic watches rely on a tiny weight and a

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Sentence Correction (SC - EA only) Questions

In order to function, some kinetic watches rely on a tiny weight and a

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards