Setting boundaries to let others know you will not accept hurtful behavior is an example of behavior

Okay, so i need some i just broke up with my boyfriend and i don't know what to do. i am crying everyday, i have nightmares, and i even wake up with the fear of talking to anyone else. it's not even making my addiction any better, it's making it worse.

Is the drug administration method with a high risk causing throat and lung cancer a) absorption b) injection c) inhalation d) ingestion

What the neurotransmitter primarily play a role in