This comes from "Life is a Dream", by Pedro Calderón de la Barca.
The correct answer to the conflict Astolfo is alluding to is option d. Without a named successor, there would be a civil war.
In order to avoid conflict, even though Astolfo is in love with Rosaura, he will marry Estrella in order to inherit the throne and by King Basilio's successor.
If two people are having a discussion, the thing they should do to ensure that the discussion is positive and rewarding is that B. they should speak openly with few inhibitions. They need to say whatever is on their mind, as long as it is not offensive.
