The counter-reformation was a religious and political movement

a. worked to spread the ideas and teachings of john calvin across europe.
b. worked to spread the ideas and teachings of martin luther across europe.
c. involved the creation of new practices and policies in the catholic church.
d. involved the creation of new practices and policies in the protestant church.

C: Involved the creation of new practices and policies in the Catholic Church

Explanation:
After the Protestant Reformation, the Catholic Church was losing members quite frequently to the Protestants. People aligned their beliefs with that of Martin Luther and John Calvin rather then those of the strict and corrupt Catholic Church. The Catholic Church had the Counter Reformation so they could reform their church and make it more like the Protestant churches so their members wouldn't leave.

Hope this helps!

It’s a and your welcome