The star system in early Hollywood can be most accurately defined as the use of famous actors to advertise certain consumer products in Hollywood films
b)
encouraging famous Hollywood actors to participate in other parts of film production like directing
the use of a star's popularity to promote movies
O d)
a form of financing provided to production companies

The use of a star's popularity to promote movies.

Explanation:

The star system in Hollywood was called that way because production companies used to hire very famous actors and actresses to star in their productions for a long period of time and they would ensure the popularity of those films because of the actors and actresses that starred them. For example, Greta Garbo was part of the star system.

i think it's but if you get it wrong its not my fault : )