Many things can be learned from a journey. You can learn from your mistakes and learn to not make the same mistakes. You can also learn alot of things about yourself, depending on what the journey is.
D. Is correct. The thesis statement is what your entire essay/paper will be about!
A
I think this answer to be A. Clustering doesn’t make sense, if anything, it would make things more difficult. Keeping a journal wouldn’t exactly have any certain effect. A is the best option because authors often BRAINSTORM before writhing a paper