Explanation:
Enter Horatio, Marcellus, and Bernardo is a stage direction from Hamlet, Act I, Scene I. A stage direction is a part of the script that indicates how the actors should move, speak, or behave on stage. It is not spoken by the characters but is included in the text to provide instructions to the actors and director. Therefore, the best excerpt from Hamlet, Act I, Scene I, that is a stage direction is “Enter Horatio, Marcellus, and Bernardo.”