Answer:
D. Unemotional
Explanation:
Although the statements the narrator is making may evoke emotions within the reader and make them feel as if human race were in danger as they may realize that they are being watched by "minds that are to our minds as ours are to those of the beasts that perish, intellects vast and cool and unsympathetic", and who represent a threat to human's society as they " regarded this earth with envious eyes", the narrator expresses the idea in a very neutral and unemotional way. There is no sign in the text that he or she is angry, panicked nor mysterious (he or she is giving many details).
The mouse ran up the clock.
