In statement given below, a part of the sentence is enclosed in quotation marks. Below are given alternatives to the quotes part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, option 'D' is the answer.He should move on to the next point, and not "harp one sting only".

• A. harp on string only
• B. harp only one string
• C. harp upon one string only
• D. No improvement