What happens when A skateboarder pushes on the ground with her foot. She and the skateboard accelerate down the sidewalk due to the force?

What happens when A skateboarder pushes on the ground with her foot. She and the skateboard accelerate down the sidewalk due to the force?
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Fill in the blanks with the appropriate option. She was already growing impatient, and _______ her foot, ready to cry at his not coming at once, when she heard the young man's ________ steps approaching neither quickly nor slowly. (a) Stamped, Discreet (b) Kicked, Prudent (c) Trampled, Unobtrusive (d) Moved, Chary

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