What is the most logical next event?

How to write a nonfiction book 
Understand the genre. 
Nonfiction writing is literature based on fact. Nonfiction writers can focus on topics like biography, business, cooking, health and fitness, pets, crafts, home decorating, travel, religions, art, history, etc.

Options are:
[A]. Take stock of the genre and their implications to ensure that you have clear content that is actually intended to entertain others, least of all readers. For example, a nonfiction one-on-one adult might be more likely to enjoy the novels of one of the world's most popular authors.
[B]. The list of possible subjects for nonfiction writing could be anything and everything. Unlike fiction, which is literature created from imagination, nonfiction is structured around real events, moments, practices, and approaches to a subject.
[C]. At the same time, nonfiction writers must focus on other interests as well. Invent and experiment to make your works interesting and engaging.
[D]. Think of a few genres of writing that are most fascinating to you and pick out a few that interest you the most. Genres like fiction and nonfiction can help you spark your interest.
[B].