In The Pilgrim's Progress, Christian and his companion are imprisoned by the people of the fair as they attempt to make their way through Vanity Fair. Option D is correct.
Vanity Fair refers to an ancient town, where, all year round, merchandise is bought and sold "as houses, lands, trades, places, honors, preferments, titles, countries, kingdoms, lusts, pleasures, and delights of all sorts, as wh*res, bawds, wives, husbands, children, masters, servants, lives, blood, bodies, souls, silver, gold, pearls, precious stones, and what not."