[gprentice]

At my club there seem to be a variety of situations when people open a strong 2C. For some people it's a game force where you want to be in game regardless of your partner's hand. Some people it's 20+ unbalanced or 23+ balanced. Some people it's 8 playing tricks. Some people it's 4 losers. Some people it's the rule of 29 - sum points plus length of two longest suits being 29 or more.
e.g.
nz bridge beginner lessons

Playing two over one what is the "best" or optimal way to play the 2C opening.
Should you have an "escape system" where responder can pass before game is reached.

If you have a 25 point balanced hand, should you rebid 3NT instead of 2NT so that you partner can pass 2NT with no points. I've been told not because it denies responder a chance to bid stayman or transfers.

[Cyberyeti]

Best solution to balanced hands is Kokish or birthright (same thing, alternative names).

2♣-2♦-2♥(hearts or bal)-2♠(pretty much forced)-2N is balanced stronger than 2♣-2♦-2N, hands with hearts bid something other than 2N.

You should play some system over 2♣-2♦-3N, what you can't do is play puppet.