Mrs. Mitty has no idea that Walter Mitty was once a valiant ship's commander. That is a dramatic irony's example.
What is dramatic irony?
The use of language that traditionally means the contrary to express one's meaning, usually for hilarious or forceful effect. is called as the dramatic irony.
This also included that the audience or readers experience more about a situation than the character, dramatic irony arises. Mrs. Mitty is completely unaware that Walter Mitty was once a brave ship's captain. That's a great example of dramatic irony.
Therefore, option A is correct.
To learn more about the dramatic irony, refer to:
https://brainly.com/question/18321974
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