Historians adapted this phrase to describe the period between 1870-1900, when growing and prosperity thinly disguised the corruption of politicians and businessmen that festered beneath the eras gold veneer.

The Gilded Age

Explanation:

The Gilded Age is the name that historians have given to the period between 1870-1900. The phrase "Gilded Age" from a satyrical novel by Mark Twain, in which he criticized the bad social conditions, and corruption, that were disguised under a thin veil of gold.

This thin veil comes from the fact that this period was one of great economic expansion and industrialization.

the three answers (for plato at least) are:

b-condemned sola fida 

d-set rules for establishing seminaries and for educating clerics in the seminaries 

f-recommended moderation in the sale of indulgences and banned the sale of false indulgences 

the real answer is b