What is the difference between a CD-ROM and a CD-RW ?

What is the difference between a CD-ROM and a CD-RW ?

A. A CD-RW can be written to, but a CD-ROM can only be read from.
B. They are the same — just two different terms used by different manufacturers.
C. A CD-ROM holds more information than a CD-RW.
D. A CD-ROM can be written to and a CD-RW cannot.