Which of the following involve(s) a suretyship relationship?

I. Transferee of a note requires transferor to obtain an accommodation endorser to guarantee payment.
II. The purchaser of goods agrees to pay for the goods but to have them shipped to another party.
III. The shareholders of a small, new corporation agree in writing to be personally liable on a corporate loan if the corporation defaults.

A. I only.
B. II only.
C. I and II only.
D. I and III only.

D. I and III only.