TOEFL / IELTS Grammar - Find the error

ScottsEnglishScottsEnglish Administrator Posts: 1,093 admin ✭✭✭✭✭✭✭
edited June 7 in TOEFL Test

Find the error in the underlined words in the following sentence:

Recent sociological studies have been shown that there is a need for populations to move from areas with fewer employment opportunities to areas with more. 

a. Recent sociological
b. have been shown
c. to move from
d. to areas with

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Recent sociological studies have shown that there is a need for populations to move from areas with fewer employment opportunities to areas with more.

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