The options for this question are:
A) somber
B) disinterested
C) angry
D) uncertain
Answer: A) Somber.
Explanation: The tone of a story is the author's attitude towards the audience, the subject or even the characters of the story. There are many kinds of tone: positive, negative, happy, sad, angry, etc. In the given excerpt, we can see that the speaker is a little confused and also uncomfortable by what seems to be a situation of suspense. Also the appearance of something in the shadows, gives this excerpt a somber tone.