Final answer:
The correct answer is 'Are.' It conforms to the modal + have been + present participle structure.
Explanation:
Correct answer: A. Are
In this sentence, the correct choice is 'Are' as in 'you are sleepwalking again.' This fits the structure of modal + have been + present participle, which indicates an ongoing action.
Example: You might have been sleeping when I called.
Learn more about Verb Tenses here:
https://brainly.com/question/42890637
