When conducting a pre-listing visual inspection of a cottage, what could cause wall cracks and uneven floors in north-facing rooms?

During a pre-listing visual inspection of a cottage, wall cracks and uneven floors in north-facing rooms can be caused by the footings being insufficiently sized or placed on weak soil. The correct answer, B, highlights the importance of having proper footings that can adequately support the structure and prevent issues such as uneven floors and wall cracks. If the footings are not properly sized or are on unstable soil, it can lead to structural problems within the building.

Options A, C, D, E, and F are not directly related to the specific issue of wall cracks and uneven floors in north-facing rooms. Therefore, they are not the correct answers in this scenario.