Final answer:
The Kelly clamp is used to clamp and divide the cardinal and uterosacral ligaments and blood supply.
Step-by-step explanation:
The instrument that will be used to clamp and divide the cardinal and uterosacral ligaments and blood supply is the Kelly clamp. Kelly clamps are surgical instruments with serrated jaws that are used to control bleeding by clamping blood vessels. They are commonly used in gynecological surgeries, including procedures such as hysterectomy.