Final answer:
To remove tough stains from heavily soiled garments, it is recommended to apply a stain remover or pretreatment before washing.
Step-by-step explanation:
If a garment is heavily soiled, it is important to take the appropriate steps to clean it effectively. Option D) Apply stain remover or pretreatment before washing is correct.
When a garment has tough stains, it is recommended to apply a stain remover or pretreatment before washing. This will help break down the stains and make them easier to remove during the washing process. Examples of stain removers include products like OxiClean or Shout. Simply follow the instructions on the product for how to apply and wait the recommended time before washing the garment.
This method will increase the likelihood of removing the stains and ensuring the garment comes out of the wash looking clean and fresh.