Viewpoint, in general, is the way one perceives a thing. Every individual carries his/her own perceptions regarding different subject matters. In literature, the viewpoint exemplifies the lens through which the author narrates a story. A character's viewpoint(given to him by the author) refers to his/her perspective(how they think) or opinion about a particular subject matter or about an event that occurs in the story. <em>Each character is distinct from the other due to the different perceptions, thoughts and feelings about the happenings of the plot.</em> Thus, the correct answer is option A.