Standard Tree Protocol (STP) is a networking protocol that was made by Radia Perlman. It makes a single path over a network, averting any loops from happening. Even if there are multiple paths to the same destinations. It has two never versions which is 802.1s and 802.1w.
[B], developing the art style guide and production plan.
It wouldn't be [A], because patches are released to consumers of the game, to fix bugs and add new content, which won't be done until post-production.
It wouldn't be [C] either, as it is also post-production, because you are sending the game to produced, packaged and shipped, meaning the game has already been pretty much fully developed.
You can compress them. ZIP is the most well known protocol.