Acceleration is defined as the rate of change go which of the following 1. velocity 2. time 3. displacement 4. position

Velocity.
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Your answer is A Velocity,velocity is the rate of the speed an object is moving like a gun being fired how fast the bullet hits something is its velocity. Also it ant C because displacement is when something is remove its not D because position has nothing to do with this question and when it came down to A and B I choose A because B Time has something to do with this question but I choose A became it better fits the answer for this question.

Your answer is A.

The speed was not exceeded so it was slow

Answerboth technicians (a) and (b);