Answer:
a) the Catholic Church didn't believe that the reformation would lead to any permanent changes, and only reacted after it did
Step-by-step explanation:
"Initially, the Pope and other church leadership members didn't take the Reformation seriously because they didn't believe it would have lasting effects. But it became clear by about 1550 that the Protestants meant to split from the Catholic Church. After that, the church became much more focused on stopping the Protestants' ideas from spreading. The church's reaction against Protestantism is called the Counter-Reformation."
to sum up that quote from the text book, the church didn't take reformers seriously until 1550 when it became clear that the protestants meant to leave the church, then they reacted against protestantism by means of Counter-Reformation.