Final answer:
The Catholic Church in this time period faced the immense tasks of asserting its authority over secular rulers and addressing internal problems such as corruption and power struggles.
Step-by-step explanation:
The two-fold immense task that faced the Catholic Church during this time was related to its power and authority. Firstly, the Church had to assert its authority and power over secular rulers who were seeking to weaken the influence of the Pope and increase their own power. This was a challenge that the Church faced in Western Europe, where political forces were vying for control. Secondly, the Church had to address internal problems such as corruption, power struggles within the church hierarchy, and the need for reform. These tasks required the Church to navigate complex political and spiritual dynamics to maintain its influence and credibility.