Read this passage.

My career in journalism has taught me the challenges of capturing sporting events, yet Gregor Powell’s descriptions are flawless. Powell is a gold-medal Paralympic swimmer, but his memoir proves that his true strength is the power of his insights.

What feature distinguishes this passage as a foreword?

It adds credibility to the book.
It is written by the book’s author.
It explains the book’s topic concisely.
It provides a high-interest “hook.”