Answer:
Explained.
Step-by-step explanation:
According to Montaigne, the "standard of truth" in his own country is permanence. This means that only that which is everlasting and unchanging can be true.
Moreover, of this standard, he thinks that it cannot be held by humans. Humans are always changing, so by definition, they are incapable of representing permanence. Therefore, permanence can only be God, who is never changed or altered. God, and the Catholic Church, therefore, are the standard of truth.