"That authority was given to the Apostles, and they gave it to the bishops. In other words, the authority to interpret Scripture belongs to the authorities of the Church. And you are not one of them."
I assume here the "Church" is the Roman Catholic church? More on that after I know your answer.
1Ti 2:4 Who will have all men to be saved, and to come unto the knowledge of the truth.
2Ti 3:16 All scripture [is] given by inspiration of God, and [is] profitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 3:17 That the man of God may be perfect, throughly furnished unto all good works.
Joh 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, [that] shall he speak: and he will shew you things to come.
God lays upon no man or denomination to teach the all truth to Christians, this is the job of the holy spirit that has been received by Christians upon receiving Christ as their savior. And God wants all of His people to know the all truth as these Scriptures say. But how that process works is not explained because the spirit works in all manner of ways to bring us unto the all truth if we ever reach that point.
Yes, though it would also include the Orthodox bishops as well, who belong to the Catholic Church, but are not as yet in full communion with the bishop of Rome.
The highest authority in the Church, under Christ, is the successor of Peter, since Peter was commissioned by Christ to be the chief of the Apostles.
-A8