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Practitioners of cognitive therapy believes that clinical depression, along with several other mental illnesses, are exacerbated by irrational or maladaptive thoughts.


A. believes that clinical depression, along with several other mental illnesses, are exacerbated by

B. believe that clinical depression, along with several other mental illnesses, is exacerbated by --> correct

C. believe that clinical depression, along with several other mental illnesses, are exacerbated by

D. believed that clinical depression, along with several other mental illnesses, is exacerbated in

E. had believed that clinical depression, along with several other mental illnesses, has been exacerbated by
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A. believes that clinical depression, along with several other mental illnesses, are exacerbated by

Subject "Practitioners" doesn't agree with the verb "believes" in number. Also note that "along with several other mental illnesses" is a modifier and doesn't change the number of the subject "clinical depression". Hence the use of "are" is wrong. INCORRECT
_____________________________________________________________________________________________________________

B. believe that clinical depression, along with several other mental illnesses, is exacerbated by

All the subject verbs agree in number and the verb tense usage makes sense. CORRECT
_____________________________________________________________________________________________________________

C. believe that clinical depression, along with several other mental illnesses, are exacerbated by

subject "clinical depression" doesn't agree in number with verb "are" INCORRECT
_____________________________________________________________________________________________________________

D. believed that clinical depression, along with several other mental illnesses, is exacerbated in

The two verbs "believed" and "exacerbated" are states in simple past making them parallel and changes the sequence. INCORRECT
_____________________________________________________________________________________________________________

E. had believed that clinical depression, along with several other mental illnesses, has been exacerbated by

use of past perfect tense without a related simple past event is INCORRECT
_____________________________________________________________________________________________________________

Hence option B
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2 subjects - 1.Practitioners - Plural Suject
2.clinical depression- Singular Subject

Correct Verb- 1. Believe (Plural)
2. is (Clinical depression is )


So "B" is the correct option
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Practitioners of cognitive therapy believes that clinical depression, along with several other mental illnesses, are exacerbated by irrational or maladaptive thoughts.


A. believes that clinical depression, along with several other mental illnesses, are exacerbated by - Subject (Practitioners) is plural but the verb (believes) is singular. This is a good example of subject-verb agreement error. Hence, eliminate (A)

B. believe that clinical depression, along with several other mental illnesses, is exacerbated by -

Practitioners believe... (correct subject-verb agreement)
Clinical depression (singular subject),....., is exacerbated by.....

There is no error in (B). Hence, (B) is correct.

C. believe that clinical depression, along with several other mental illnesses, are exacerbated by - subject verb error. So, eliminate (C)

D. believed that clinical depression, along with several other mental illnesses, is exacerbated in.... - exacerbated means "to make an existing problem much worse". So, "exacerbated in" literally translates to "to make a problem worse in...". This obviously doesn't make any sense. Hence, eliminate D

E. had believed that clinical depression, along with several other mental illnesses, has been exacerbated by - The usage of 'had believed' tells us that the belief is no longer present (i.e. it WAS something that was previously believed in the past but now this belief does not exist). Option (E) literally destroys the intended meaning of the prompt. Hence, (E) is incorrect.
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