Job is "work" that gives you pay. "Work" is just.. uh.. labour. Can be volunteer or just general work. Sorry for my cringe worthy answer
D - A run-on sentence has only one clause
A run-one sentences has at least one independent clause and one dependent clause incorrectly connected.
It may be A because all others have commas in incorrect spots
Boring because it seems like recording would be boring.
Interesting because you record things and some of the things you record could be interesting
Long because you would have to sit through tons of meetings
Sorry i could only thing of three