Zaroff is portrayed as Rainsford's foil as Zaroff has no conscience, while Rainsford does have a conscience.
Zaroff is a character from 'The Most Dangerous Game' whose main job is to prey humans as a sport activity. As the game progresses, Rainsford becomes the prey for Zaroff and attempts to save himself from Zaroff.
Hence, option A holds true regarding the portrayal of Zaroff.
Learn more about Zaroff here:
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