ANSWER:
d) all of these
STEP-BY-STEP EXPLANATION:
If no net force acts on an object, it remains at rest if it is initially at rest, or maintains its speed if it is initially in motion. Objects can move at a constant speed while experiencing zero net force; if the speed is constant, the acceleration is zero.
So the correct answer is at rest, zero acceleration, and constant speed, that is option d) all of these
