The single most important piece of evidence to bolster the Roman church's claim to primacy was the

The correct answer is b) Petrine authority.

Explanation:

Petrine authority is known as the authority that Peter is given over the twelve disciples who followed Jesus, this due to Peter's relationship with Jesus. In the bible in some verses, it can be seen that Jesus declares that Peter should continue evangelizing his people, even indicating that Peter will build his church.

From the primacy of Peter the basis for the primacy of the bishop of Rome is born, giving the pope the Petrine authority and it is considered that Catholicism is born from the Gospel of Peter.

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