The ROM acronym

A$)$ stands for Random$-$access Only Memory, to differentiate it from sequential access memory.

B$)$ is the name of a R$/$W $($i$.$e$.$ Read$/$Write$)$ type of memory.

C$)$ is the name of a memory device that comes in different dataword widths, and different sizes of address spaces.

D$)$ all of the above.