By sucking sup from the young twigs of the hemlock tree,

Question

By sucking sup from the young twigs of the hemlock tree,  tree growth is retarted by the wooly adelgid, causing needles to change colour from deep green to grayish green and to drop  prematurely

A...

B. tree growth is retarted by the wooly adelgid, and this causing the colour of needles to change from deep green to grayish green, and their dropping

C. the wooly adelgid retards tree growth, which causes needles to change colours from deep green to grayish green, and dropping

D. the wooly adelgid retards tree growth, causing needles to change colours from deep green to grayish green, and to drop

E. the wooly adelgid retards tree growth, and this causes the colour of needles to change from deep green to grayish green, and the their dropping

equarkster · Answer

A is not correct because the retarded tree growth is not causing the color change. (Misplaced Modifier)

B is also a variation on the Misplaced Modifier.

C corrects the modifier problem but the sentence has faulty parallelism (retards tree growth...dropping)

E is also incorrect because of faulty parallelism.

 D is correct because the wooly adelgid is the cause of the retarded tree growth and the sentence is parallel. The modifier is placed correctly and the parallelism is corrected.

tarungmat · Answer

D it is.
following reasons---

Avoids passive voice
maintains Parallelism

rchadha · Answer

Ans is d?

causes to.....and to.....
modifier: wooly modifies the 1st phrase

Antmavel · Answer

had an hesitation between C and D but would go for D

pjreddy_rec · Answer

D for me too.

Can someone explain why D is correct option.

jade3 · Answer

"causing...." is required to explain cause and effect phenomena

Moreover, "to change" and "to drop" are parallel.

So I would go with Choice D

DeeptiM · Answer

In D...by sucking...and to drop is not parallel

however, in C..by sucking and dropping is parallel..

Pls help explain why C is wrong!!

viks4gmat · Answer

the needles are the ones changing color and dropping to the floor. Hence D is indeed parallel

the wooly creature sucks out sap from the twigs 
causing needles (some part of the plant)
to change color 
and
to drop prematurely

-----------------------------------------

if the sentence intended to say the wooly thing
 sucks the sap out of a plant 
AND
drops prematurely

then C would have been right... but then the above logic doesnt make sense does it?

LogicGuru1 · Answer

Answer Is D
A and B are out of modifier issues
BETWEEN C,D and E :- D is best . Parallelism "to change colour" and "to drop"
 p.s:- This is the one of the most lazy post I have seen. No sign of even a little bit of effort .

By sucking sup from the young twigs of the hemlock tree,

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