It's C- organizing the information is the next step.
If this went chronologically she would make an outline and draft after this step.
I guess she wanted to get to the Lancelot's room sneaky using the key she has got. And she put on the socks as she wanted to look not so ladylike. But it's still not clear for me.
The meaning of the word alleged is (of an
incident or a person) said, without proof, to have taken place or to have a
specified illegal or undesirable quality. So among the choices alleged is
something similar to word suspected.so the answer is a