The best way to prevent a knife from slipping off the surface of a vegetable or other food item is to a. clean your knives regularly b. sharpen your knives regularly c. use a cutting board d. store knives in a knife block

B, sharpen your knives regularly

The correct option is C.
In order to properly cut a food substance with knife, a cutting board should always be used when one is cutting a food substance. A cutting board is a piece of wood or plastic on which one can easily cut food materials.

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