Concept:Nonvolatile memory stores data permanently and does not require electrical power to retain information.
Explanation:Computer memory is divided into volatile and nonvolatile categories.
Volatile memory needs a continuous power supply to keep its contents, so it loses data when the system is switched off.
Nonvolatile memory, however, keeps its data intact even after power is removed.
ROM and flash memory are classic examples of nonvolatile types because they preserve instructions and files without power.
RAM and cache memory are volatile because they act as temporary workspaces that clear when power stops.
Thus, the nonvolatile memory types in the list are represented by labels I and III.
Any option that includes RAM or cache is wrong, since those are volatile.
Therefore, the only correct combination is I and III.
Answer:A. I and III only