During the Pre-Industrial Age,most Advertisements Took the Form of Signs

During the pre-industrial age,most 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) most advertisers could not afford more sophisticated advertisements.
C) there were laws prohibiting advertising in newspapers.
D) the churches would not approve other forms of advertising.
E) signs and symbols were considered lucky.