Across the loose confederation of German territories, the Church’s sale of indulgences for the specific purpose of provoked harsh lay criticism and was the final straw that eventually led to the Protestant Reformation.
a) rebuilding Saint Peter’s Cathedral in Rome
b) sending missionaries to the Orient
c) repaving the streets in Paris
d) outfitting the pontiff in several new outfits

(a) rebuilding Saint Peter’s Cathedral in Rome

Explanation:

An indulgence was part of the medieval Christian church, and a significant trigger to the Protestant Reformation. Basically, by purchasing an indulgence, an individual could reduce the length and severity of punishment that heaven would require as payment for their sins, or so the church claimed.

it would have to be gasioline

the answer is b: an economic crisis throughout the country.