The correct answer is D. As they pursuit to make their way through Vanity Fair, they are imprisoned by the people of the fair. Vanity is the kind of people who have too much pride in their own appearance, abilities, achievements.
When Christian meets Faithful who accompanies him to Vanity Fair. It is a place where human tastes and lusts are sold. In Fair, both of them are arrested and detained because of their contempt towards Fair business. Faithful is put on trial, and later executed by burning.
