Isabelle entered into a contract to purchase Mark's house. Isabelle will make a 25% down payment; however, she still needs a loan to close on the property. Why should Isabelle include a mortgage contingency in the sales contract?

There is no guarantee that Isabelle will get approved for loan. A mortgage contingency allows Isabelle to back out of the contract if she can't get a loan and still get her earnest money back.

The mortgage contingency will allow Isabelle to close on the property more quickly.

A mortgage contingency is not needed in this case since it usually applies to commercial properties.

The mortgage contingency will allow Isabelle to back out of the contract if the property fails to pass inspection.