Marijuana at a House Party

[curiosity jailed the cat]

My question involves criminal law for the state of: Georgia
My question is hypothetical but is still important and relevant.
In this scenario there are three people involved, Person A, Person B, and Person C.
Person A goes to a very small gathering of friends to consume marijuana. Person B brings the weed and it's Person C's house. All three have just smoked marijuana and are reclining in a separate room from the weed. The police bust in or somehow attain entry to the house and find the weed. If person A sells out person B and C and sings like a whistle to the fact it is not their weed, who gets arrested? Who gets charged? Does person A get off because they do not possess the weed and it is not their house? Also person A provides thorough testimony and statements of the guilt of person B or C.

[Mr. Knowitall]

The police could arrest them all.

[Disagreeable]

The police could charge them all.

[curiosity jailed the cat]

I notice you say could. What is likely however? What if Person B claimed ownership of the marijuana? Why would all three be arrested? It is person C's house and all three are in a separate room from the weed. Being high is not a punishable crime, however possessing drugs is. Who is to say Person A was involved with weed besides simply being an occupant of the house?

[Disagreeable]

Ask the prosecutor involved.

http://law.onecle.com/georgia/16/16-13-30.html
http://law.onecle.com/georgia/16/16-13-2.html

[curiosity jailed the cat]

I know of the statutes. I don't feel you've answered the question fully though. I really want to know. I ask your opinion. In your experience what is most likely in this case?

[Disagreeable]

All will be charged, The squealer will get a lessor charge.