Final answer:
In 'The Pilgrim's Progress', Hopeful encourages Christian by reminding him of three key victories: surviving the Enchanted Ground, triumphing over the Doubting Castle, and enduring the Hill of Difficulty.
Step-by-step explanation:
The question refers to John Bunyan's The Pilgrim's Progress, which is an allegory of the Christian journey to salvation. Hopeful encourages Christian by recalling three key experiences. These experiences are B) Surviving the Enchanted Ground, triumphing over the Doubting Castle, and enduring the Hill of Difficulty. These trials are symbolic representations of the struggles a Christian may face on the path to spiritual enlightenment and salvation, drawing parallels to the way early Christians drew inspiration and guidance from biblical stories of the Old Testament, and reflected in their art and literature.