Mass measure the amount of _____ in a body.
inertia
Explanation for the correct option
(A): inertia
Explanation for incorrect option
(B): Motion depends upon the parameters like distance, displacement, speed, velocity, and acceleration.
(C): The velocity of an object depends upon the time, gravity, mass, etc
(D): The acceleration of an object depends on the mass of the object and the amount of force applied.
Hence, mass measure the amount of inertia in a body. Hence option (a) is correct.