Final answer:
The volume of gas molecules is negligible compared to the total volume of gas because of their large separation. This is due to the empty spaces between the molecules and the small size of the molecules themselves.
Step-by-step explanation:
The actual volume of molecules of gas is negligible compared to the total volume of gas because the molecules of gases have a large separation compared to their sizes. This means that the molecules take up very little space compared to the empty spaces between them. As a result, the volume occupied by the gas molecules is much less than the volume of the container. Therefore, both option A and option B are correct.