Question

With that push, they have accelerated their masses, which means they have _____ of their bodies.

Answer 1

As per Definition of acceleration we know that rate of change in velocity of object is known as acceleration

$a = \frac{v_f - v_i}{\Delta t}$

so when we apply push on an object that push or applied force will change the velocity of object always

so correct answer must be

a.) changed the velocity

Answer 2

The answer is

A: Changed the velocity