"Asian carp" is not an example of "feral swine". Hence A and E can be eliminated ("such as" is used to introduce examples). It is meant that "Asian carp" is similar to "feral swine". Hence "like" is correct. B, C and D remain.

Comma + conjunction is used to introduce a clause - therefore ", but" must have been followed by a subject and a verb ("that are", not just "are"). Hence C can be eliminated. B and D remain.

The past perfect "have threatened" is wrong. The "threatening" is not an action that has been completed in the past, but whose effect is stil there. Henec B is wrong. D remains.

First, "such as" vs "like".
The intended meaning is the FACT "feral swine are unwelcome" is like the FACT "Asian carp are unwelcome in Lake Michigan".
Clearly, Asian carp is not an example of feral swine.
In addition, "such as" refers examples of the same category. For example: I love eating Asian fish such as catfish and Asian carp.
So, A and E are out.

Second, Present perfect VS simple present/progressive.
B is wrong because present perfect tense is wrongly used. Because we want to mention two similar facts ==> simple present / progressive is correct
C is also wrong because the usage of "are" is redundant. For example: She is tall and is smart ==> the second "is" is not necessary and should be eliminated.

D is correct, the structure is "X are unwelcome BUT far larger......:
"feral swine are unwelcome but far larger, more vicious and mounted on four legs"

Hope it helps.

Asian carp is shown as an example here, so why not use such as?
some one please explain
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I chose option D.

One can eliminate options B & E because they use the wrong form of 'threaten' which needs to be in the present tense in accordance with the given sentence "there is general agreement..."

Between A, C & D - Option D is the most concise & simple form that also happens to be correct grammatically. Option A is clearly wrong because of its usage of " , but that are far larger ..." because it intereferes with the parallelism. I felt C & D were close but D did the job in fewer words!

Hope it helps.
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I second ankurgupta03, I do not like this question at all.

I just wanna point out a thing that is not correct from your explanation:
the sentence : "She is tall and is smart" is perfectly correct and there is no better choice between that one and "She is tall and smart ".

This is a parallelism problem: generally speaking the parallel structure has some "signal words" that tell you where the parallel structure begins and ends.
"Both _X_ and _Y_" in this case the X and Y part MUST be parallel, because they are contained between the signal-words "both/and".

In your example there is no "starting" point for the parallelism. What I mean is that to identify a proper parallel structure you start from the "signal"-and-, look to the right
She is tall and is smart
and ask your self: is that part matched in the previous part? Yes, by "is tall"- same structure.

Also "She is tall and smart" is correct as smart is matched by tall.
Since here the parallelism has no predefined starting point, both are correct.

If your sentence were "She is both tall and smart", only this option would be correct because "both" tells you that the parallel structure begins from the adj tall, which is matched by the adj smart.

Hope it's clear

you have to know that a carp is not a type of swine (pig) in order to rule out "such as"

D. is the best option.

It is clear that this is a comparison, not a list of examples - discard A and E.

threatened an invasion - awkward B is discarded

C has "are" but no subject for it, discarded as well.

D is the only option left

use such as when you have more than one example to list otherwise use like for nouns and as for clauses

For non-native speaker, this one is really hard. First, what is carp? and second: is it a swine?
In order to kick out such as or like, you are quite stuck...

nevertheless, I have a question here:

Why chose D over C? because for me C has a better comparison: Zombies are funny but ARE dead

Can somone explain here plz?

Thanks
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Out of C and D, I chose D as I felt C lacked parallelism.

like the Asian carp that are threatening to invade Lake Michigan, but are far larger, are more vicious, and are mounted on four legs
Hope my analysis is correct.
Please correct me if I am wrong.

like can be used to compare two nouns. Here such as cannot be used as this sentence does not introduce any example. It is comparing feral swines with Asian carp.

"are" is used before threatening - and then later a "but" is used so we can the "are" as common to all the parallels

D looks good, but I don't know why C is wrong. I read all explanation, but no one can make it clear.

I feel C lacks ||ism

C)like the Asian carp that are threatening to invade Lake Michigan, but are far larger, more vicious, and are mounted on four legs

I think C is the correct option, because but introduces contrast between asian carp and feral swine if there is no "are" then it looks like but modifies the invasion.

OA:

D. Because this structure is drawing a comparison and not giving an example (feral pigs are not Asian carp...but they're similar to Asian carp in this respect), the structure "like" must be used, eliminating A and E. Choice B is illogical - the Asian carp have not announced plans to attack, so you cannot say they "have threatened". And choice C breaks parallel structure for the list at the end, using "are" on terms 1 and 3 but leaving it off of 2. Only choice D is free of these errors, so choice D is correct.

Actually, the problem with C, is that it use 'are' twice.

hii,
Although going through all post ,I understood structure of the sentence but still I am unable to get the meaning of the sentence .Pls help

Please explain how to get to the correct answer for the below question:
There is generally agreement that feral swine are unwelcome ??? such as the Asian carp that are threatening to invade Lake Michigan, but that are far larger, more vicious and mounted on four legs.
A)such as the Asian carp that are threatening to invade Lake Michigan, but that are far larger, more vicious and mounted on four legs
B)like the Asian carp that have threatened an invasion of Lake Michigan, but far larger, more vicious, and mounted on four legs
C)like the Asian carp that are threatening to invade Lake Michigan, but are far larger, more vicious, and are mounted on four legs
D)like the Asian carp that are threatening to invade Lake Michigan, but far larger, more vicious, and mounted on four legs
E)such as the Asian carp that threaten to invade Lake Michigan, but are far larger and more vicious, and mounted on four legs
[Reveal] Spoiler: OA

The meaning is as follows:

The following is generally agreed:
Feral swine are unwelcome because they are similar to Asian carp that are threatening to invade lake Michigan. However the difference between those Asian carp and Feral swine are as follows:
Feral swine are larger and more vicious, and they have 4 legs.

Compare with the following simpler construction:
I am like my brother, but more intelligent and less healthy.