Hmmmm, I don’t know this one…
A "They're" is "they are" which is a clause-- nowhere near a noun.
B "Playing" is a verb.
C "Loud" describes a noun, music, so it is an adjective.
D "Music" is a noun because it falls in the category of "idea, place, thing".
I hope that helped.
The subordinating conjunction in this sentence is “so that”, demonstrating cause and effect. The cause is because the door is locked and the effect is “so I would not be locked out of the house”.
In my opinion, it depends on the amount of crimes the prisoner has committed in the past and the severity of the current crime.