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Problem 17 - Entrance Test

The company implemented a new customer service protocol aimed at improving response times and enhancing customer satisfaction. The data indicate that the new protocol _______ reduced customer complaints, _______ leading to a significant increase in customer loyalty and positive brand perception.

Correct: A

The correct answer is 'markedly; thereby'. 'Markedly' is an adverb modifying reduced. 'Thereby' directly connects the reduction of complaints to increased customer loyalty. Marked cannot correctly modify reduced. While 'thus' is also correct in meaning, 'thereby' more directly highlights the consequence.