Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to cat proof your apartment [title] Test your screens. [step] If you open your windows often, check to make sure your screens don't give easily under pressure. Some screens will pop out, letting your cat escape or even injuring your cat if it falls out of a second-or third-story apartment.

Ending1: Some screens might also be able to produce a mild allergic reaction that would alarm your landlord upon inspection if done properly. When you are a landlord to a detainee, you should keep your screens clean. Ending2: If you have other screens that you don't mind dropping, or screens your cat won't like standing on, try testing your screens. [substeps] This is especially important if you have an entire apartment (not just one). Ending3: [substeps] If your screens do pop out, only open your windows a crack or ask your management staff if they can be changed out. [title] Always check your dryer and dishwasher. Ending4: [title] Install a portable air-conditioner. [step] This is especially helpful in areas where temperatures drop below freezing.

Answer format: ending1/ending2/ending3/ending4