Final answer:
Option c) 'LADY MARKBY is a pleasant, kindly woman, with gray hair' is the excerpt most likely from a play's stage directions, providing guidance on a character's appearance rather than spoken dialogue.
Step-by-step explanation:
The excerpt most likely to be from a play's stage directions is option c) LADY MARKBY is a pleasant, kindly woman, with gray hair. Stage directions in a play are instructions written by the playwright that provide guidance on the movement, position, or tone of an actor, or the sound effects and lighting. They describe the appearance or actions of characters, setting details, and the nuances of a performance which are not spoken by characters.
Excerpts a), b), d), and the other provided excerpts consist of dialogue, which is the spoken parts of the script, and would not typically include stage directions. Stage directions are essential for the actors and director to understand the intentions of the playwright and to bring the story to life on the stage as envisioned.