He discover that he might suffer from some mental disorder causing him to react aggressively and with no limits at all,suffering afterwards from the aftermath of his own actions therefore he decides to keep a journal about it for research....
It's B. The verb 'tell' is ditransitive, i.e. , it can take both direct/indirect objects.
1) Color Coding
2) Labeling your notes
3) Use muscle memory to remember where your work is
