I think its B? judging the quotes he has stated.
using your phone as a calculator
I believe the answer to this would be C
Answer:
Brainstorming
Explanation:
In simple words, Individual brainstorming" is strategist done alone. Taking notes, free talking, localisation, and creating a mind map, which is a visual note-taking approach in which individuals layout their concepts, are all common practices.
This techniques are used for academic projects preparation also. Thus, from the above we can conclude that the Angel is involved in brainstorming.