The Canterbury Tales was a popular book of the period because it

A. contained many different stories.

B. had characters from all walks of life.

C. was written in easy-to-understand language.

D. described middle - and upper-class fashions

The Canterbury Tales was a popular book of the period because it c) was written in easy-to-understand language. This was because it was written in Vernacular English language, at a time where most tales were written in Latin, French or Italian. Chaucer at his time was part of the time of this trend where English-language stories were taking off.