Final answer:
The statement is true as Henrik Ibsen, Anton Chekov, and August Strindberg are pioneers of Realism in theatre, which focused on depicting everyday life and societal issues realistically, shifting away from the idealized characters of previous eras.
Step-by-step explanation:
Henrik Ibsen, Anton Chekov, and August Strindberg are indeed pioneers of Realism in theatre, making the statement (a) True. Ibsen is often referred to as the "father of modern realistic drama" with his play A Doll's House tackling social themes and breaking the tradition of using noble characters, instead using ordinary people that audience members could relate to.
Chekov focused on the psychological realities of individuals trapped by social circumstances in plays like Three Sisters and The Cherry Orchard. While Ibsen and Chekov made substantial contributions, August Strindberg also had a profound influence on theatre with his expressionistic works. These playwrights' commitment to reflecting societal issues and portraying believable characters helped shape modern theatre.