What is sagging?

• A. This is an unacceptable process of refunding useless money.
• B. It is an unacceptable process in which products imported through illegal means are sold or tried to be sold.
• C. It is an unacceptable process in which a product is sold or tried to sell, which has passed its date of sale.
• D. It is an unacceptable process in which a product is sold or attempted to be sold, using the excuse of market-related research.