Read the following context and choose the best option to answer the question.
Context: The not knowing if he was or he was n't . It was literally killing me ! Fortunately , a friend recommended a book to me that changed my life .
Question: Why is the narrator so grateful to the friend ?
Options: 
A. None of the above choices .
B. The friend has recommended them a job .
C. The friend has recommended them for a course .
D. The friend has recommended them for a loan .


A