Answer: The tone of the passage is "optimistic". The words "But she was ready, firm in her goal: She would nail this interview" imply that even after having some trouble, she managed to ignore it and continue. This contributes to the overall meaning of the passage by making the reader understand that obstacles may appear on your journey, but optimism helps you achieve your goals.
Explanation: The passage is written with an optimistic tone. A tone in a passage is responsible of transmitting the necessary feelings and ideas to the reader, in this case, after knowing all of the unfortunate events, and reading the words: "But she was ready, firm in her goal: She would nail this interview", the reader infers that the woman did not care about them, because she would still have a successful interview.