If the authors purpose in "how to prepare for a road trip" is to inform students about how to prepare for a road trip, what is most likely her secondary purpose?
a. to persuade her readers that travel can be a rewarding experience.
b. to persuade parents to give their students money for a road trip.
c. to persuade students to avoid getting a job as long as possible.
d. to inquire about how many students would be interested in traveling across the country.