The best answer to the question "Realism in the theater stemmed from authors and actors from which country?" is:
A. France
Explanation:
1. Realism in theater originated in France during the 19th century.
2. French playwrights like Henrik Ibsen and Anton Chekhov were influential in developing realistic drama.
3. The movement focused on portraying everyday life and situations on stage, emphasizing truthfulness and accuracy.
4. French theater practitioners played a significant role in shaping the realism movement and its principles.