Answer: A) Panicked.
Explanation: The tone of a text or sentence is the author's or speaker's attitude towards the audience, the subject or even the characters of the text. There are many different kinds of tones, like: positive, negative, objective, sad, angry, etc. From the given options, the word that best describes the tone of the passage is "panicked" we can see that in the fact that the speaker is desperatly trying to plan what she is going to do in that almost empty room.