The oncee-ler is the narrator and a character in The Lorax. He was a greedy industrialist who cut down all of the trees to make a peculiar garment known as a thneed..
I’m going to say it’s probably B but don’t take my word for it
To provide images of events described in the text.
Hope I helped!!!
It is C because you are going to compare the different settings, characters and point of view.