Answer:
A. Ice on ice
Step-by-step explanation:
Coefficient of friction explains or estimates the relationship between two objects in terms of the force of friction between them and the normal reaction between these two objects. Depending on the objects involved, coefficient of friction varies from surfaces to surfaces. Rougher surfaces tend to have greater coefficient of friction compared to smoother surfaces. Therefore in the options provided, ice on ice tends to have the smoothest surfaces contact and thus will have the lowest coefficient of friction.
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