Edgar received a text message from Groupon this morning, letting him know about an opportunity to take a series of 5 horseback riding lessons at a nearby stable for $199, a value of $400. Edgar has always wanted to try horseback riding, so he bought the Groupon. The Groupon first affected Edgar in the ______ stage, as the Groupon highlighted the difference between his ideal and actual states. problem identification information search alternative evaluation post-purchase behavior