The correct answer is option A.
In modern drama, the plot does not always follow a strict structure as they usually experiment with a non-traditional plot. For example, the play "The Sound and The Fury" by William Faulkner is told from the perspective of different characters. Each of them tells the same story but from their point of view.
In Modernism, the stories might also end without a clear resolution since Modernism is an umbrella term under which we can find techniques borrowed from Cubism, Dadaism, etc.