The answer is c) Knight and the Prioress
The verbal irony here is “my windows commanded an unobstructed view of a lofty brick wall”
This use of irony tells the reader that there was a perfect view of a brick wall from the windows
Well, in his letter to the church he states that the problem needs to be reveled and fixed. For the people like him who are not being shown equality "it is like sinking in quicksand". He mention multiple reason for equality. The main purpose of that letter is so the church would make a change.
hopes this helps