“A solid workout plan, good sleeping and eating habits, and a lot of sacrifice make one successful in a marathon.”

What is the purpose of the author’s word choice in the sentence?

A to give details about what to eat before a marathon
B to emphasize the qualities needed to run a marathon
C to make an argument that persuades the reader to run a marathon
D to introduce ideas on how to convince others to run a marathon

B to emphasize the qualities needed to run a marathon