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