Read the following context and choose the best option to answer the question.
Context: This book helped me so much that I joined her affiliate program . You can see from the links on the side that I ' m not happy go lucky with who I promote . So please do n't think this is attempt to get you to buy random junk that wo n't help you . I honestly fully believe it will .
Question: Why is the writer choosing to promote the book ?
Options: 
- The incentive to promote it is large .
 - The book was an easy read for the writer .
 - None of the above choices .
 - The book offers sound advice .


The book offers sound advice .