Hey, any Orthodox Bronies out there? I have a few questions.

I know that this isn't the usual spot for religious talks, but I thought I'd ask a few questions about the Orthodox Church.

My first question is this:
Why does the Orthodox Church not accept the papacy? And what are your reasons/evidence for rejecting it?

Second Question:
Why does the Orthodox Church not do missionary work?

Third question:
What evedience can you give me for the Orthodox Church being the One True Church (note: I am a Catholic, so try and give me everything you can)