To answer this question, we need to analyze each option and determine why the correct answer is A.
Option A) "ally to give an excruciating vision of guilt" - This option is correct because it suggests that the resolution of the novel and the revelations it brings combine or work together to create a highly distressing or painful portrayal of guilt.
Option B) "to us give a vivid picture of guilt" - This option is incorrect because it does not accurately reflect the original statement. The original statement does not mention anything about "us" or the readers being given a vivid picture of guilt.
Option C) "is a painful picture of a guilt-ridden world" - This option is incorrect because it does not capture the idea of the resolution and revelations in the novel creating a vision of guilt. It instead implies that the novel itself is a painful picture of a guilt-ridden world.
Option D) "does not really solve all the questions in the narrator's mind" - This option is incorrect because it focuses on the resolution of the novel not providing complete answers to the narrator's questions. It does not address the idea of a vision of guilt or the revelations in the novel.
Therefore, the correct answer is A) "ally to give an excruciating vision of guilt" because it accurately represents the concept of the resolution and revelations in the novel working together to create a highly distressing portrayal of guilt.