We want to see which units the rate that describes the motion of the car has, we will see that the correct option is A. "miles and hours."
A rate, as its name implies, is a ratio between two quantities.
For example, speed is a rate between distance traveled and the time it takes to travel that distance.
Then there are two units describing the rate, distance units and time units, like in:
"50 miles per hour"
From this, the correct option is the first one, the rate that describes the motion of the car would have units of:
A "miles and hours"
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