Susan is a novelist who writes children's books for readers between the ages of 4 and 8.She is under contract with a publishing company that is authorized to make and distribute copies of her book, in exchange for payment of a royalty.If the publishing company sells Susan's rights in her children's books to a movie producer, and the movie producer hires a screenwriter to adapt the book for a new movie, which, if any, of Susan's exclusive rights has been violated by the publishing company and movie producer?

a.public display

b.reproduction

c.public performance

d.prepare derivative works