Correct option is D
Peer review.
While mind mapping, freewriting, and brainstorming are all pre-writing strategies that help organize thoughts and ideas, peer review typically comes after a first draft is written. It involves sharing one's work with peers for feedback and critique. Peer review helps writers see their work from a different perspective, receive constructive criticism, and make revisions based on the feedback. While it's a crucial part of the writing process, it's not typically considered a pre-writing activity.