Important!
If pop-ups are blocked for the website, please allow them in your browser and restart the course. Continue the course from the new tab, and do not close this tab until you have completed the course.
Something is not right with this house. It’s up to you to take a look at these four conditions and answer the question, “What is wrong with this structure?”
For reference, here is a relevant segment of the Carson Dunlop Home Reference Book: