Answer: c. Bait and switch
Step-by-step explanation:
The illegal pricing practiced in the above scenario is referred to as bait and switch. Bait and switch is a sales tactic whereby businesses or companies claims they've certain products which are usually of low prices or quality in order to lure customers to them and when the customers arrive, they usually tell the customers that the goods are not available and tell them to buy an identical good which is costlier.
This is the method used by the hardware store that advertises a 3/8" Black and Decker Power Drill for $29.95 and when the customer gets to the store, it was unavailable and the customer was told to buy Model 3309, which sells for $49.99.