The answer is option D, Sancho Panza.
Step-by-step explanation:
In chapter 12 of the story, Sancho Panza was the one who encouraged Don Quixote, the protagonist, to ride out again. Probably, in book 1 Don Quixote would not have followed Panza's advice, but in book 2 he did it.
Don Quixote, by Miguel de Servantes, was originally published in 1605. It narrates the adventures of a gentleman Don Quixote and his friend Sancho Panza.