Which trait distinguishes modern drama from traditional drama?
a. the plot of a modern drama does not always follow a strict structure and might end without a clear resolution.
b. while traditional drama usually stuck to a five-act structure, modern drama can vary from three to eight acts.
c. modern dramas are generally written in verse, while most traditional dramas are written in a combination of prose and verse.
d. modern dramas generally feature stock characters, while characters in most traditional dramas are distinct and
well-defined.

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.  

A. The plot of a modern drama does not always follow a strict structure and might end without a clear resolution.

Explanation:

There's a very noticeable different in the way that traditional and modern drama are written. The first is the characters, since modern drama uses common people and traditional drama tends to use more distinct characters. Also, the structure of them go in opposite ways. While in the traditional drama we have a verse and prose format, making it strict, the modern drama is more flexible and loose.