The answer is letter C. It's UNLESS
Explanation
Identify the error on the following sentences.
The answer is letter D. It's CAN HARDLY
The answer is letter C. It's FUTHER
The answer is letter B. It's AFTER
The answer is letter A. It is WAYS
The answer is letter B. It's I WAS.
The answer is letter D. It's CAN DO
The answer is letter C. It's LACK OF EXERCISE
The answer is letter A. It's BUT
The answer is letter A. It's HAVE