Final answer:
Christian loses his certificate at the Hill Difficulty in John Bunyan's 'The Pilgrim's Progress' when he falls asleep at the arbor and leaves it behind in his rush to continue his journey. Option D.
Step-by-step explanation:
Christian, the protagonist in John Bunyan's The Pilgrim's Progress, loses his certificate at the Hill Difficulty. The certificate is symbolic of the assurance of his salvation and acceptance at the Celestial Gate. This particular event occurs when Christian falls asleep at the arbor, which is halfway up the hill.
He awakens in a rush, realizing it is nearly night and he has yet to summit the hill, and in his haste, he leaves behind the crucial document. Later, Christian becomes aware of his loss and must backtrack in distress to retrieve it, demonstrating a crucial moment of character development and the consequences of spiritual negligence.
So Option D.