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GMAT® Official Guide 2018Practice QuestionQuestion No.: SC 707
Page: 687
The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and
have become readily accepted despite some initial opposition when it was first introduced in 1974.
(A) have become readily accepted despite some initial opposition when it was first introduced in 1974
(B) has become readily accepted despite some initial opposition when they were first introduced in 1974
(C) have become readily accepted despite some initial opposition when first introduced in 1974
(D) has become readily accepted despite some initial opposition when the bar code was first introduced in 1974
(E) bar codes have become readily accepted despite some initial opposition when it was first introduced in 1974
Universal Product Code (A) Subject-Verb (have); Pronoun (it)
(B) Pronoun (they)
(C) Subject-Verb (have)
(D) CORRECT
(E) Pronoun (it)
First glanceMost of the answers begin with either
have or
has; find the Subject to determine whether the Verb should be singular or plural.
Issues(1) Subject-Verb: haveCheck the subject-verb pairings for all of the answer choices. Answers (A) and (C) both say
the use of the bar code … have become readily accepted.
Use is singular and
have is plural, so eliminate choices (A) and (C) for a bad subject-verb match.
Answers (B) and (D) both correctly use
the use … has become. Answer (E) changes the form to insert a new, plural subject for the final, plural verb:
bar codes have. Keep these choices in.
(2) Pronoun: it; theyThe
it pronoun in the original sentence does match the singular
bar code, but there’s still a difficulty. It is a subject pronoun, so the first expectation is to check the subject earlier in the sentence to see whether that subject is the antecedent for the pronoun. In this case, the subject is
use. But the
use was not first introduced in 1974. Rather, the bar code was. This potential ambiguity is enough to give
answer (A) a
question mark, though the test will likely give you a stronger reason to eliminate this answer (in this case, that’s the
subject-verb mismatch).
Answer (B) uses the pronoun
they in the same position.
Use,
bar code, and
Universal Product Code are all singular; none can match with the plural pronoun
they.
Answer (E) introduces a new plural subject,
bar codes, but then pairs that with the singular pronoun
it. In this case, the sentence should use
they; eliminate
(E) for a
faulty pronoun match.
The Correct AnswerCorrect answer (D) pairs the singular verb
has become with the singular subject
use. It avoids the pronoun issue entirely by repeating the words
bar code rather than using a pronoun.
Meaning is crucial to solving this problem:Understanding the intended meaning is key to solving this question; the intended meaning of the crucial part of this sentence is that the use of the bar code has become readily accepted despite some initial opposition when the bar code was first introduced in 1974.
Concepts tested here: Subject-Verb Agreement + Pronouns + Grammatical Construction• If a list has only two elements, they must be joined by a conjunction.
• Semicolons or "comma + conjunction" are used for introducing an independent clause.
A: This answer choice incorrectly refers to the singular noun phrase "The use of the bar code" with the plural verb phrase "have become readily accepted".
B: This answer choice suffers from a pronoun error, as the pronoun "they" lacks a clear and logical referent.
C: This answer choice incorrectly refers to the singular noun phrase "The use of the bar code" with the plural verb phrase "have become readily accepted".
D: Correct. This answer choice correctly refers to the singular noun phrase "The use of the bar code" with the singular verb phrase "has become readily accepted". Further, Option D avoids the pronoun error seen in Option B, as it uses no pronouns. Moreover, Option D uses the clause "The use of the bar code...has been readily accepted", conveying the intended meaning - that
the practice of using bar codes has become readily accepted. Additionally, Option D correctly uses conjunction ("and" in this sentence) to join two elements in a list - the verb phrases "has expanded beyond supermarkets to other retail outlets" and "has become readily accepted...1974"; remember, if a list has only two elements, they must be joined by a conjunction.
E: This answer choice alters the meaning of the sentence through the clause "bar codes have become readily accepted"; the construction of this clause incorrectly implies that bar codes,
themselves, have become readily accepted; the intended meaning is that
the practice of using bar codes has become readily accepted. Further, Option E incorrectly uses conjunction ("and" in this case) to join the independent clauses "The use of the bar code...has expanded beyond supermarkets to other retail outlets" and "bar codes have become readily accepted...1974"; please remember, semicolons or "comma + conjunction" are used for introducing an independent clause.
Hence, D is the best answer choice.All the best!
Experts' Global Team