Which was the catholic church’s most powerful tool in maintaining its authority in medieval europe? a. its missionary work b. its monasteries and convents c. its control over the sacraments d. its hospitals and schools

I'm pretty sure its A. its missionary work

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.

d) all choices are correct