Select from: (i). Iron the towel, leaving any water that might drip off completely damp. Mark your spot with a line on the sock.; (ii). The amount of wetness will depend on the number of pet urine you collect. Choose a product with an absorbent finish, as it is often more effective on carpets than stain-resistant ones.; (iii). Once puddles and scuffs disappear, you're ready to move on. Bring a trash bag to fill with vinegar and throw out the pesticide.; (iv). Place them over the stain completely and put something heavy on top, like cans of food, a pair of shoes, or a book. The moisture helps soak up the urine, while the weight presses the towels down into the carpet.;Choose from options above and answer: What most naturally follows?

How to remove pet urine from carpet 
Absorb the mess. 
Use wet towels or paper towels, layered and topped by some kind of weight, to quickly absorb fresh puddles. Run the towels under cool water, then wring them out so they're damp but not dripping.
Answer:
(iv).