So,
In this question, we are given to parameters.
1) Velocity (v) = 60 miles per hour
2) time (t) = 5 seconds.
Given that, the car can go from a stopped position to 60 miles per hour (v) in 5 (t) seconds.
In short, it is velocity/time
=> v/t
As we know that change in velocity over time (v/t) is called acceleration. Hence, the first option is correct.