Can someone help please

The description of the house in this excerpt gives an example of

The difference between point of view and choice of person in a story is that "person" is the literary name given to main characters in a story, and "point of view" is the perspective from which we view the story "person" is part of a term used to describe the type of narrator (as in first-person or third-person); "point of view" is how the antagonist understands the events of a story the terms are interchangeable; there is really no difference between them "point of view" refers to the perspective from which the story is told; "person" is part of a term used to describe a type of narrator (as in first-person or third-person)

Which verb or verb phrase signals an inappropriate shift in mood. a) will you let b) should first change c) must attend d) will be served