Why Would Journeymen Printers Figure Prominently Among Lay Protestant Promoters

Why would journeymen printers figure prominently among lay Protestant promoters?

A) Catholic leaders rarely published their teachings; naturally, printers resented them.
B) Protestant propagandists paid much better than their Catholic opponents.
C) Most printers objected to the Catholic indexes of forbidden books.
D) Literacy was an important tool to grasp Protestant beliefs and doctrines; printers were among the most literate profession.
E) Protestant literature was so much more diverse than Catholic literature; printers were drawn to a greater variety of works.