Final answer:
Folks Southern Kitchen is using a D) Price-off promotion for their $8.99 lunch special, reducing the regular price to attract customers.
Step-by-step explanation:
The promotion being used by Folks Southern Kitchen when they advertise an $8.99 lunch special for a meal that normally costs $10.99 during March is a Price-off promotion. This type of promotion offers a reduction in the regular price of the product or service to encourage more customers to try or purchase it. It is not a coupon, as the discount is not given via a coupon that needs to be presented to get the reduction. Neither is it sampling, which would involve offering a free trial of the product or service, nor a premium, which would involve giving something additional for buying the product at the normal price.