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Bunuel
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Bunuel
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The verbs in A, B and E are incorrect, so that leaves us with a Since/When decision between C and D. For C, Since tells us that this is a reason for the rest of the sentence. Companies only have one chance at brand loyalty. Why? Because people don't complain when service is bad. This is perfect.

Contrast with choice D. Companies only have once chance at brand loyalty, but only when the majority of customers do not complain. They can have multiple chances in other contexts. This incorrectly modifies the entire meaning of the sentence, and shifts it from causality to an occasional preference. The answer here must be C.

Hope this helps!
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But what is the reason for option B to be wrong ?
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The problem statement is a general statement... so simple past is appropriate. Hence A, B and E are wrong!
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Is this question from the OG or GMAC? I would like to know whether I should anticipate a question with similar construction on the actual test.
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Hi,

Can you please clarify the use of 'since'?
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But isn't "since" supposed to be used ONLY as a measure of time and not as a measure of "causality"?

Posted from my mobile device
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abhishek10
I think this is a high-quality question and I don't agree with the explanation. for 2nd option, Have not complained is Present perfect and not past perfect. Please explain why we cannot use present perfect?

Please let us know the reason why B option is wrong as I am also having the same doubt..
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Bunuel
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Since the majority of customers are not complaining when they are dissatisfied, even those organizations most concerned with customer service have only a single opportunity to establish brand loyalty.

A. Since the majority of customers are not complaining
B. Since the majority of customers have not complained
C. Since the majority of customers do not complain
D. When the majority of customers do not complain
E. In the event that the majority of customers are not complaining

Correct verb form and use of the word since to indicate a causal relationship are being tested in this sentence. Because the sentence refers to events occurring in present time, the use of simple present tense and the verb form do not complain are required. Additionally, the parts of the sentence are logically connected in a causal relationship: because most customers do not complain, companies do not have a second chance to establish brand loyalty. This logical relationship requires the use of the word since.
  1. Are not complaining is present progressive tense and is not correct in the sentence.
  2. Have not complained incorrectly uses past perfect tense.
  3. This option correctly uses do not complain in present tense and the word since to indicate a logical causal relationship between parts of the sentence.
  4. The word when introduces an unnecessary chronological element into the sentence.
  5. The phrase in the event that is wordy and does not express the necessary logical relationship among parts of the sentence.

Answer: C
Isn't the explanation for option B supposed to say "present perfect" and not "past perfect"?
Can you please confirm?
Thanks in advance.
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Bunuel
Official Solution:

Since the majority of customers are not complaining when they are dissatisfied, even those organizations most concerned with customer service have only a single opportunity to establish brand loyalty.

A. Since the majority of customers are not complaining
B. Since the majority of customers have not complained
C. Since the majority of customers do not complain
D. When the majority of customers do not complain
E. In the event that the majority of customers are not complaining

Correct verb form and use of the word since to indicate a causal relationship are being tested in this sentence. Because the sentence refers to events occurring in present time, the use of simple present tense and the verb form do not complain are required. Additionally, the parts of the sentence are logically connected in a causal relationship: because most customers do not complain, companies do not have a second chance to establish brand loyalty. This logical relationship requires the use of the word since.
  1. Are not complaining is present progressive tense and is not correct in the sentence.
  2. Have not complained incorrectly uses past perfect tense.
  3. This option correctly uses do not complain in present tense and the word since to indicate a logical causal relationship between parts of the sentence.
  4. The word when introduces an unnecessary chronological element into the sentence.
  5. The phrase in the event that is wordy and does not express the necessary logical relationship among parts of the sentence.

Answer: C
Isn't the explanation for option B supposed to say "present perfect" and not "past perfect"?
Can you please confirm?
Thanks in advance.

I believe it was a typo.
Anyway why do we need to use present tense here?

I interpret as the statement reveals general truth so it's better to use simple present instead of present perfect.
Is my understanding correct GMATNinja AjiteshArun
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OE is wrong in explaining B) The tense is Present Perfect ( have not complained ) and not Past Perfect ( had not complained )
OA is right! Present tense 'do' goes with the 'are' following
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I think this is a high-quality question and I agree with explanation.
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