The answer is A. Reformed many of the major abuses that were in the Catholic Church.
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which was initiated by Council of Trent (1545-1563). It is embodiment of counter-reformation.
Explanation: It is one of the most important councils in the history of the Catholic Church. It is considered the first council in the modern history followed by Vatican I and Vatican II. Motivation of Council of Trent was the traditional ambition to keep unity of western Christendom (to keep all Catholics and not to permit any splitting or to keep monopoly of Roman-Catholicism). There were some monarchs who felt responsible for failure of that Emperor Sigismund (15th century) of Emperor Charles V.