The answer is letter C. It's TO HEAR
Explanation
Identify the error on the following sentences.
The answer is letter B. It's HAPPIER or MORE HAPPY
The answer is letter C. It's WERE
The answer is letter B. It's OBSERVED
The answer is letter A. It's WHICH HAS BEEN
The answer is letter B. It's ON
The answer is letter D. It's OF
The answer is letter D. It's MINDED
The answer is letter A. It's ARE
The answer is letter D. It's YOUR