How does a new KDP writer supposed to market a book?

D) that are presented with bad covers, bad descriptions, or ludicrously bad interior formatting.

Because you cannot persuade readers to buy any book in which sentences do not make sense. This shouldn't be “does.” If you don't see the problem, that is a big problem.

What do you think of India's IT Minister Ashwini Vaishnaw comparing the Indian government's efforts to build a localised AI model to sending a mission to the moon at a fraction of the cost?

B) Build a newsletter mailing list of people who will buy your book because they trust you to write books they want to read. This is slow, but ideal.

B) that are filled to the brim with typos or errors.

C) Persuade book reviewers on BookTok or Substack or someplace to recommend your book. If your book is unreadably terrible, this is probably impossible.

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C) that are unreadably terrible in any other way.

Are you planning to proofread your book to avoid sentences such as

E) Take a solid year to learn how to use Amazon or Facebook ads and be prepared to lose quite a bit of money as you figure it out.