What Aspect of Protestantism Led to an Increase in Literacy

What aspect of Protestantism led to an increase in literacy?

A) Egalitarianism said there was no difference between the rich and the poor.
B) Luther's belief in the priesthood of all believers encouraged reading the Bible.
C) Catholicism's ban on education for females.
D) Greater trade between formerly adversarial regions after the Peace of Augsberg.
E) Uprooting the traditional hierarchy that said the lower classes should know their place.