Why are the opinions of Ted Fraser and David Pelly presented in this excerpt?

— ExhibitC

Why are the opinions of Ted Fraser and David Pelly presented in this excerpt?
A . to give authority to the view that Annaqtuusi’s work is important
B . to show that the author knows many important people
C . to present two opposing views on the subject
D . to add humor to an otherwise serious article
E . to make more people want to buy Inuit artworks

Answer: A