In the extract, the narrator's tone during his experiment is best described as businesslike. So, (Option A) is the correct answer.
What is the tone used in the given excerpt from Exhalation?
Ted Chiang's sci-fi short story "Exhalation," which is epistolary in style, is about a scientist who dissects his own brain and discovers that it operates according to the "flow of air" through gold leaves.
He deduces from his hypothesis that when the "atmospheric pressure" is "the same below and above" the ground, the entire computation and time will stop.
He also keeps thinking about how all known universes are destined for balance, as well as the possibility of the existence of all other universes. He now understands that life and civilization are miracles.
As a result, choice (A): "businesslike" is the correct answer.
Check out the link below to learn more about Exhalation;
https://brainly.com/question/13525676
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