Choose the option nearest in meaning to the word or phrase underlined.
His persistently poor performance is already driving his parents round the bend.
The correct answer is: D
Explanation
The phrase "driving someone round the bend" is an idiomatic expression that means to cause frustration or distress. While "mad" (option B) might seem like a close option, "causing his parents some problems" is the most accurate choice in this context, as it suggests that the poor performance is creating difficulty for the parents.