Which type of scriptwriters does not sell their copyrights?

Printed in 1640, this was one of the earliest books made in America

a. Southern Harmony b. Bay Psalm Book c. New England Psalm Singer d. Mayflower Compact e. Ainsworth Psalter

Andrea Pisano's south doors for Florence's baptistery were commissioned by ____

a. the guild of bronze workers b. Enrico Scrovegni c. the guild of wool importers d. the Franciscans