That would be the answer C and of not it would be D
Simply say thank you for the opportunity to have an interview and explain how excited you are to have the chance to work there, Make sure to be as polite as possible
Hope this helps
a blog supporting cell phones for students in school -> to argue
a blog sharing a video for a band’s latest song -> to advertise
a blog listing the daily specials and discounts for a restaurant -> to inform
a blog instructing readers how to create various hairstyles -> to entertain