What religion unified the byzantine empire?
a. judaism
b. eastern orthodox
c. zoroastrianism

I believe it would be b. Eastern Orthodox.

The Counter-Reformation served to solidify doctrines that many Protestants were opposed to, such as the authority of the pope and the veneration of saints, and eliminated many of the abuses and problems that had initially inspired the Reformation, such as the sale of indulgences for the remission of sin.

Heres that paraphased:

The Counter-Reformation helped to solidify doctrines that many Protestants opposed, such as the pope's authority and the veneration of saints, while also eradicating many of the abuses and problems that had sparked the Reformation in the first place, such as the sale of indulgences for the remission of sins.

Hope these helps bestie :3