Imagine that you are studying with your friend Nancy at her apartment. Nancy has some music on, including K-pop songs by the boy band BTS. You've never heard the music before. Which of the following, if true, would indicate that hearing the songs led to a mere-exposure effect for you?

• (a). The next time you hear those songs by BTS, you know what the songs are talking about even though you don't know any Korean at all.
• (b). The next time you hear those songs by BTS, you like the songs more than you would have if you had not heard the songs at Nancy's apartment.
• (c). The next time you hear those songs by BTS, you say, "Oh, I heard those songs before at Nancy's apartment."
• Both (a) and (b) must be true before you can say that there's been a mere-exposure effect.
• (a), (b), and (c) must all be true before you can say that there's been a mere-exposure effect.