Assume that the promissory note from Vexnet to Onyx Advertising was payable on a date certain. However, the note was signed by Jonathon Shipperley, who did not have proper authority to sign the note. All other elements of a valid negotiable instrument were met. Which of the following is true?

A. Onyx would have liability on the note if it ratified Jonathan Shipperley's signature.

B. Onyx would have liability on the instrument if the company was negligent in letting Jonathan Shipperley sign the note.

C. All of these.

D. Jonathan Shipperley would have personal liability on the note.