The correct answer for this question is this one: "2. appointed his own archbishops"
Pope gregory VII do to change the balance of power in the medieval period is that he appointed his own archbishops. In this way, he have to decide carefully.
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In his most famous piece of work, The Prince, Niccolò Machiavelli basically wrote a manual on the types of existing principalities, poiniting out the difference between each of them, on the foundations of power and, finally, on the norms of conduct that the one who aspires to be prince must adopt.
According to the author, it was not enough to achieve power; the prince should be able to keep it, and to do so, he would have to be respected by the people, acting accordingly to each circumstance, changing strategies as appropriate. The most famous saying that synthesizes the Machiavellian though is "The ends justify the means", which means that in order to remain in the custody of power (which would be the "end"), the prince is authorized to act in the most convenient manner, not necessarily needing to stick to rigid moral principles and ethical norms.
The most traumatic era in the entire history of Roman Catholicism, some have argued, was the period from the middle of the 14th century to the middle of the 16th. This was the time when Protestantism, through its definitive break with Roman Catholicism, arose to take its place on the Christian map. It was also the period during which the Roman Catholic Church, as an entity distinct from other “branches” of Christendom, even of Western Christendom, came into being.
The spectre of many national churches supplanting a unitary Catholic church became a grim reality during the age of the Reformation. What neither heresy nor schism had been able to do before—divide Western Christendom permanently and irreversibly—was done by a movement that confessed a loyalty to the orthodox creeds of Christendom and professed an abhorrence for schism. By the time the Reformation was over, a number of new Christian churches had emerged and the Roman Catholic Church had come to define its place in the new order.
After the war with Great Britain was held, America was given its independence from its once mother country, Great Britain.