Explanation
1.The correct answer is C
The error in this sentence occurs at (C), where there is subject-verb disagreement. The plural verb “make” does not agree with its singular subject, “An abundant supply.”
2.The correct answer is A
The error in this sentence occurs at (A), where there is an improper verb form. The use of “requires that” dictates that the subjunctive form of “to wear” is needed. The phrase “have been wearing” should simply be “wear.”
3.The correct answer is C
The error in this sentence occurs at C. The plural verb “have” does not agree with the singular subject “writer” and should be replaced with the singular verb “has.”
4.The correct answer is D
The problem in this sentence is one of illogical comparison. Alexandra is said to consider Mohammed's insightful interpretation more sophisticated than the other performers, improperly comparing his interpretation to other performers, rather than to interpretations of other performers. The correct sentence reads: At the music recital, Alexandra enjoyed listening to her friend Mohammed's insightful interpretation, which she thought was more sophisticated than the interpretations of the other performers.
5.The correct answer is D
The error in this sentence occurs at (D), where there is an inappropriate verb form. The infinitive “to achieve” is needed to parallel the infinitive “to use.”