Answer:
B. Compare the speed of her toy to another similar toy.
Explanation:
A body is said to be in motion when there is a change in position with respect to time. The speed of a body in motion is a measurement of distance to time. The formula is given thus;
Speed = Distance * Time
To accurately determine the fastness or slowness of a moving object, comparisons should be made, or a standard used to ascertain the truth. When a comparison is made with an object with similar characteristics, then it becomes easier to know which is moving faster or slower when the speeds are compared. An average can be obtained, and if the speed of the object being checked falls below average, then it is slow. If the speed is above average, then it is fast.
So, for Yasmine to know if her toy is moving fast or slow, she needs to compare hers with another similar toy.