It would be A.
They ARE currently going around the neighborhood, so that's why I would say A.
A would be the correct answer :)
Answer:
D
Explanation:
If the question was
"Mr. A: he is coughing continuously
Mr B: he ought___ Doctor."
Then the answer choice that would fit the sentence would be "to see" because then the sentence would be "he ought <u>to see</u> Doctor."
I hope this helps!