Sentence Correction

More common among friendly competitors than among bitter rivals,the undesirable consequences of tacit collusion often include oligopoly ,which harms consumers by raising prices above efficient levels

A .
B . Leading to undesirable consequences, and more common among friendly rivals than bitter enemies ,tacit collusion often include
C .Tacit Collusion,which is more common among friendly competitors than among bitter rivals ,leads to undesirable consequences ,often including
D. More common among friendly competitors than bitter rivals,tacit collusion leads to undesirable consequences,such as
E.More common among friendly competitors than bitter rivals,the undesirable consequences of tacit collusion are often including


Please explain

What is the right answer?
I thought D but then SC is not my strongest point

Is the answer C?

Always underline the part of statement in SC question.

A is my answer

B,D,E are discounted because they compare 'among friendly competitors' with 'bitter competitors'.
These sentences should have 'among' before bitter

C is discounted because if we remove the modifiers, the sentence looks like this
Tacit collusion leads to undesirable consequences which harms consumers...
when the harming part is actually caused by oligopoly

Is the answer correct?

IMO, D (but C looks OK as well)

More common among friendly competitors than among bitter rivals,the undesirable consequences of tacit collusion often include oligopoly ,which harms consumers by raising prices above efficient levels

A. Miscplaced modifier
B. Lack of parallelism in introduction: leading to... and more common
C. This one looks OK to me as well. I don't like the ending 'often including' which sounds akward
E. Misplaced modifier


@barron: we don not need to repeat 'among' I think because it is implied (is is what Kaplan 800 calls an ellipsis)

What is OA?

Guys...

The bad news is that I don't know the OA ..

Confused between C and D myself...

Can any GMAT expert please help us on this SC please...

Thanks
Anon

Anon wrote:More common among friendly competitors than among bitter rivals,the undesirable consequences of tacit collusion often include oligopoly ,which harms consumers by raising prices above efficient levels

A .
B . Leading to undesirable consequences, and more common among friendly rivals than bitter enemies ,tacit collusion often include
C .Tacit Collusion,which is more common among friendly competitors than among bitter rivals ,leads to undesirable consequences ,often including
D. More common among friendly competitors than bitter rivals,tacit collusion leads to undesirable consequences,such as
E.More common among friendly competitors than bitter rivals,the undesirable consequences of tacit collusion are often including


Please explain

Please underline the question stem going fwd.

Modifier Q, What is more common among friendly competitors than among bitter rivals? Tacit Collusion

The correct modification happens in D
uses such as to show that OP is an example
Which refers back to OP

C changes the whole construction which is not needed.

among should be used before both comparable things..

C is very awkword and its the disturbances which is common not the conclusion