TOEFL Listening: TPO-TOEFL阅读TPO - CC07W1FT3M6_YZD6N$

In paragraph 4, why does the author mention that King Joao's courtiers "hungered to return to Portugal and their lost estates"? A. To illustrate how conservative the courtiers were. B. To help explain the position taken by the courtiers. C. To give an example of the effects produced by the revolution. D. To show why King Joao advised his son the way he did.