Final answer:
Inertial reference frames either remain at rest or move at a constant velocity without acceleration. Thus, frames at rest and frames moving at constant velocity qualify as inertial reference frames. Frames that accelerate or are in circular motion do not.
Step-by-step explanation:
The question relates to the concept of an inertial reference frame, which is a frame of reference in physics. According to the definition of an inertial reference frame, we consider frames that either remain at rest or move at a constant velocity in a straight line, without experiencing acceleration, to be inertial frames.
Therefore, the correct options are:
- A) Frames moving at constant velocity
- C) Frames at rest
Inertial reference frames are frames of reference in which Newton's laws of motion are valid, and objects appear to obey these laws without the need for introducing fictitious forces. In other words, an inertial reference frame is one that is either at rest or moving with constant velocity.