PLZ HURRY Read this excerpt from Exploring the Titanic.

Now we had barely five weeks to complete our difficult mission. Five weeks not only to find the Titanic miles down in the middle of nowhere, but to bring back photographs of the wreck for the waiting world to see. My dream of finding the Titanic was turning out to be a constant fight against time and nature.

Which words from the excerpt best help set the tone of the text?