Read the following context and choose the best option to answer the question.
Context: I got a pleasant surprise at dinner tonight . My friend passed me my CD sleeve ... and I thought it was weird . When I turned it over , my heart melted and I saw a message written by Jason Mraz on it .
Question: What is a CD sleeve ?
Options: 
- None of the above choices .
 - it is a container for holding paper Certificates of Deposit details .
 - It is a Central Detective folder on a case I have been following .
 - It is a organizer for holding Compact Discs .


It is a organizer for holding Compact Discs .