Explanation

　　1.The correct answer is C

　　Choice (C) is correct. This version of the sentence correctly compares the young athlete’s accomplishments with her coach’s accomplishments, not with her coach. In addition, it uses the plural pronoun “those” to refer to the coach’s accomplishments, which allows the noun “coach” to be correctly modified by the noun phrase “a former track star.” The possessive noun “coach’s” cannot be modified by a noun phrase.

　　2.The correct answer is D

　　Choice (D) is correct. It avoids the awkwardness and wordiness of the original by using the idiomatic phrase “dominated by information rather than industry” to characterize the “new era” discussed in the sentence.

　　3.The correct answer is A

　　Choice (A) is correct. It avoids the errors of the other options by using the phrase “Its fossil record” to describe what has remained “virtually unchanged over 100 million years.”

　　4.The correct answer is C

　　Choice (C) is correct. It avoids the error of the original by following both parts of the “both … and” construction with the pronoun “his” (“In both his … and his … ”).

　　5.The correct answer is D

　　Choice (D) is correct. It avoids the awkwardness of the original by using the idiomatic “as … as” construction to compare “Africa” with “Asia.”

　　(E) that she was to be the first African American having received

　　6.The correct answer is A

　　Choice (A) is correct. It avoids the errors of the other options by using the idiomatic “distinction of being” to express what the play “won for its author Lorraine Hansberry.”