Final answer:
The expression that represents the combined value of the items in both closets is Mr. McNiel + Mrs. Rinn (Option A).
Step-by-step explanation:
The expression that represents the combined value of the items in both closets is Mr. McNiel + Mrs. Rinn (Option A). To find the combined value, we simply add the value of Mr. McNiel's items to the value of Mrs. Rinn's items. This assumes that the value of the items in each closet is represented by the respective expressions.