What is a CD that you can burn more than once called?

• A. CD-R
• B. CD-RW
• C. CD-ROM
• D. DVD-RW

Answer: (B)

The idea here is recognizing which type of disc can be rewritten after you’ve burned data. The CD that can be erased and reused is the CD-RW. It uses a phase-change material that can switch between writable and erasable states, so you can erase the old data and write new data multiple times on the same disc.

Other options don’t fit this scenario: a CD-R is write-once, so once you burn data it can’t be erased or rewritten; a CD-ROM is read-only and isn’t designed to be written to at all; a DVD-RW is rewritable, but it’s a different format on a DVD, not a CD, so it isn’t the correct type when the question specifies a CD.