Under the studio system
a. all of the options are correct.
b. the studios had no control over the private lives of their creative talent
c. actors were independent contractors who could work for any studio
d. movies were made using an assembly-line process
e. producers were hired to direct the pictures

The correct answer  for what is under the studio system is Option D: movies were made using an assembly-line process

Explanation:

This term was used first in 1920 when major Hollywood studios would create lots to make their movies there and have a larger control over the process.

An example of this can still be seen in Universal Studios, Paramount Studios and Warner Bros Studios were they have lots where people still film their tv shows and movies there instead of in location.

answer; i believe that the correct answer is rapid and subsequently slow down;