E is correct..
"has created a new class..." this one requires a noun to complete the sentence.
to be able to adjust is not a noun
but the ability to adjust is a noun ..

so the ability to adjust ... has created .. is right.

E for me as well.

A and B are out because they use "they" for a coyote.

C goes for "when to be able"

D goes for "as being a supreme adapter"

"when" is a subordinating conjunction and thus calls for any Clause.
(E) correctly introduces adverbial clause "when the ability..." which is modifying the verb of the mail clause (established).

(C) lacks in introducing any clause.

E
The coyote => singular => cross out A and B
C. "to be able" or to do is never a subject in a sentence on gmat. The only exception is the situation in which " to do is to do.."
D. change meaning: "its ability to..." and awkward : " as being a supreme adapter ..."
.

Eliminate a and b since 'They' is used although we are addressing 'The coyote'.
E is the correct answer.
Can you please tell the source?

actually i cant name it, a friend of mine shared some pdf files containing these q's.

This is a classic S-V agreement question, with a long middle man introduced through the additive "along with". Additives do not make a subject plural.

Split 1 : S-V agreement : Eliminate A and B.
Split 2 : when to be is C out.

D is wordy and can be eliminated over E.

E is the correct answer.

The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

A. they have established themselves as supreme adapters in an era when the capability
B. they have established themselves as being supreme adapters in an era when being able
C. it has established itself as a supreme adapter in an era when to be able
D. it has established itself as being a supreme adapter in an era when its ability
E. it has established itself as a supreme adapter in an era when the ability

Answer : E

taking subject verb agreement into account , A and B can be easily eliminated

D uses being a supreme adapter , which is too wordy

C when to be able to ..adjust is incorrect construction , ability to adjust is correct wording

The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

A. they have established themselves as supreme adapters in an era when the capability
B. they have established themselves as being supreme adapters in an era when being able
C. it has established itself as a supreme adapter in an era when to be able
D. it has established itself as being a supreme adapter in an era when its ability
E. it has established itself as a supreme adapter in an era when the ability
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Correct idiomatic usage of ability is - ability to

None but (E) presents the same...

Hence answer will be (E)
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The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

A. they have established themselves as supreme adapters in an era when the capability. --Subject is Coyote (singular)

B. they have established themselves as being supreme adapters in an era when being able --Subject is Coyote (singular)

C. it has established itself as a supreme adapter in an era when to be able

D. it has established itself as being a supreme adapter in an era when its ability

E. it has established itself as a supreme adapter in an era when the ability --Correct.
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The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, it has established itself as a supreme adapter in an era when the ability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

Correct answer must be (E) for the errors highlighted in the other options...
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sayantanc2k

Please can you throw some light?

C vs E ?

Read the two sentences below:

C) to be able to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.c--> Doesn't make Sense

E) the ability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals. --> CLEAR and Meaningful

Note that after when we have an independent clause. "The ability to do something has created something".

I hope that makes sense.
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The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

A. they have established themselves as supreme adapters in an era when the capability - Pronoun they can't refer to singular coyote
B. they have established themselves as being supreme adapters in an era when being able - same as A
C. it has established itself as a supreme adapter in an era when to be able - the ability in E is better than to be able to
D. it has established itself as being a supreme adapter in an era when its ability - usage of being
E. it has established itself as a supreme adapter in an era when the ability - Correct

Answer E
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Guys. I got this question right in the exam but upon reviewing it I got a little confused.

Begining of the sentence "The coyote is ..." makes it clear that Coyote is singular and we need to use a singular(it) in order to refer to coyote. However, what if we want to talk about species. In that case, we will use they to refer to species. Now can "they" used in the original sentence not refer to species?

Also, I had a confusion if species is singular or plural, but by looking at this sentence it seems that species is plural.correct?

so sorry if it's too dumb of a question. Appreciate any input.
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GMATNinja
Please help. I am confused between C & E. Why E is winner over C.

Hi May be I can help.

Choice is wordy whereas choice E is concise and short.
GMAT prefers less convoluted and more concise language.

C it has established itself as a supreme adapter in an era when to be able

Notice the end of the choice C to be able is wordy and there is no need to use infinitive to.

E it has established itself as a supreme adapter in an era when the ability

E is correct as it removes verbiage and the meaning is very clear.

Hope it helps.

in choice C, "to be able" show a future action. this is incorrect
I learn gmat to go to US . in this sentence, "to go to us" is a future action.

I feel this point is hard. anyway, I have tried to explain