Official Solution:Studies of performance reports show that, compared to those whose colleagues have English as their native language, managers whose colleagues speak English as a second language are markedly more effective.A. to those whose colleagues have English as their native language, managers whose colleagues speak English as a second language are markedly more effective..
B. with those whose native language is English, managers whose colleagues speak English as a second language are markedly more effective.
C. to them whose colleagues’ native language is English, managers whose colleagues are not native English speakers are markedly effective.
D. with them whose colleagues are native English speakers, managers whose colleagues are not are markedly effective.
E. to those whose colleagues are native English speakers, managers whose colleagues speak English as a second language are markedly effective.
There are three issues discussed in the question:
Issue 1 - Idiomatic use of “compared….”: Correct: Compared + absolute form of adjective. Example: Compared to men, women are emotionally strong.
Wrong: Compared + comparative form of adjective. Example: Compared to men, women are emotionally stronger.
Issue 2 - Meaning: Two groups of managers are compared, one whose colleagues are native speakers and the other whose colleagues speak English as a second language.
Issue 3 - Use of pronoun “those” to create “new copy” of the antecedent: The pronoun “those” creates a “new copy” of the antecedent “managers”, i.e. a new group of managers are referred to by the pronoun “those”.
A. Wrong because of issue 1: The usage “Compared to A, B is more effective” is wrong because the comparative adjective “more effective” is used instead of the absolute form “effective”.
Moreover the usage “whose colleagues have English as their native language” is wordy. The usage “whose colleagues are native English speakers” is more concise and hence better.
B. Wrong because of issue 2: changes the meaning of the original sentence. “Managers whose native language is English”, rather than “managers whose colleagues are native English speakers” are compared to “managers whose colleagues speak English as a second language”.
Wrong because of issue 1 as explained in A above.
C. Wrong because of issue 3: Use of the pronoun “them” to create a “new copy” is wrong. The pronoun “those” must be used.
Wrong because of issue 2: changes the meaning of the original sentence. The group “managers whose colleagues are not native English speakers” is not the same as the group “managers whose colleagues speak English as a second language”. The latter is only a subset of the former.
D. Wrong because of issue 3: The pronoun “them” is wrongly used instead of the pronoun “those” to create a “new copy”.
Wrong because of issue 2: meaning is changed as explained in C above.
E.
Correct. All the three issues are correctly addressed.
Answer: E