Tina saw an elegant handbag while browsing through an e$-$commerce Web site and immediately purchased it$.$ A day later, she noticed that the bag was available at a $50\%$ discount. She now regrets her impulse purchase as she could

have bought it at a lower price if she had waited. In the context of postpurchase behavior, Tina's actions in this scenario are an example of

subliminal perception

need recognition

selective exposure

cognitive dissonance