Answer:
B
Explanation:
I think you are intended to choose B. No matter what else you do, you ought to be flexible enough to alter your ideas as you find out more.
It does not source information. Whether or not you use a separate sheet for sources is up to you. I would. But it is not the function of an outline to deal with sources rigidly.
I'm not sure you shouldn't include detailed notes. Perhaps the titles of the outline could serve as headings for the notes which are kept separately.
If B is true, then A is not
