Read the passage.

excerpt from Act I, Scene 1, in Hamlet by William Shakespeare

In this excerpt, three soldiers discuss their sighting of the dead king's ghost.

Horatio
Stay! speak, speak! I charge thee, speak!

[Exit Ghost.]

Marcellus
'Tis gone, and will not answer.

Bernardo
How now, Horatio! You tremble and look pale:
Is not this something more than fantasy?
What think you on't?

Horatio
Before my God, I might not this believe
Without the sensible and true avouch
Of mine own eyes.

Question
What is the most likely meaning of the word avouch in this scene?

story
question
truth
right

The most likely meaning of the word "avouch" in this scene is "truth."