How prove the Church has a teaching commission from Christ?

Six points:There was a man Jesus who, (2) claimed to be sent from God; and (3) proved He was by miracles done with a tie to the claim and, (4) in the crowds He had a smaller group, the Twelve and, (5) told them to continue His teaching and, (6)Promised protection:"He who hears you hears me." Our sketch of apologetics did not show anything about a Pope. True, but once we have a group or church commissioned to teach by someone sent from God, and promised protection, that group can tell us there is a Pope and what he can do. Also, two major Protestants, Albright and Mann in Anchor Bible, Matthew agree with our reading of Matthew 16.