Take context from the input text and decide on the accurate relationship between 'American Girl' and 'doll' from the options provided.
Options: distribution format, employer, product/material produced, owned by

The new boutiques will also include a selection of popular doll accessories and Dress Like Your Doll ™ girl-sized clothing, plus a variety of American Girl’s best-selling books , the 2015 Girl of the Year movie , and American Girl ® magazine —all available in Spanish.
product/material produced