Which of the following is not true about staying organized while doing your research?
a. your research will be a lot more difficult if you are chaotic and messy with your notes.
b. if you take notes on a computer, try keeping all your notes in one folder with a subfolder for each main idea.
c. it is a good idea to use a notebook, note cards, or folders to keep your notes in place.
d. taking notes without source information will make it easier to find the information you need later.

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)