Until the Advent of Public Schooling in America,many Advertisements Took

Until the advent of public schooling in America,many advertisements took the form of signs with symbols,such as a beer tankard indicating a tavern,because:

A) most people were illiterate and could not read.
B) the advertisers could not afford to produce sophisticated advertisements.
C) there were laws prohibiting advertising in newspapers and handbills.
D) the Church would not approve of any other form of advertising.
E) such advertisements promoted puffery.