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Problem 9 - Entrance Test

The company's profits increased dramatically (A) this year, due in part to a successful marketing campaign (B) and also to the implementation of new cost-saving measures; (C) these measures, while initially unpopular, proved (D) to be highly effective. (E) No error

Correct: B

The phrase 'due in part... and also to' is redundant and unidiomatic. It should be simplified to 'due in part to... and to'. 'Also' is not needed. Therefore, part B has the error