A dealership's advertisement for a used car prominently features a low price, but in small print, it states this price is only available to customers who finance with the dealership and trade in a vehicle from the last five model years. Which advertising practice is this dealership likely violating?

1. Puffery, which is legally acceptable.
2. Bait-and-switch advertising.
3. Standard industry practice for promotions.
4. Full and clear disclosure rules.