Is Al stayed at the library until it closed a compound-complex, independent clause or a compound

This is an independent clause.

Explanation:

A compound sentence is composed of more than a single independent clause.

Ex.: Al stayed at the library, and then he went home.

A compound-complex sentence is composed of more than a single independent clause AND has a dependent clause attached (either before or after it).

Ex.: Al stayed at the library, and then he went home because he was tired.

Ex.: After soccer practice, Al stayed at the library, and then he went home.

i highly recommend james madison. the work is simple and if you stick to it you can graduate quickly. the work is simple and the teachers are very interactive. the flow of the school work is all on your time so it's not really a dead line. go on their website and look at pricing and enrollment plans. i know when i signed up i got a discount. you pay a certain amount of money every month. it's kind of expensive but i did it in 6 days tops with just my senior year left : )