Question: How to remove set-in laundry stains.

  Options: 
 A. Saturate set-in stains with vinegar, then rub the spot with a paste made from equal parts vinegar and baking soda. You can add a couple tablespoons each of vinegar and laundry detergent to a bucket of water and soak the garment overnight ​if the stain persists. Rinse and wash.
 B. Saturate set-in stains with vinegar, then rub the spot with a paste made from equal parts vinegar and baking soda. You can add a couple tablespoons each of vinegar and laundry detergent to a bucket of water and soak the garment overnight ​if the stain persists. No rinsing required.
Answer: A