Texas State is interested in the impact of different library layouts on students' happiness while studying in the library. The librarians test layout A versus layout B using an independent samples design and find that students are significantly happier as a result of layout B with an effect size of $d = 0.25$. The librarians also test layout A versus layout C using an independent samples design and find that students are significantly happier as a result of layout C with an effect size of $d = 1.39$. Based on these results, which layout should the librarians choose to make students the happiest?
Layout C
Either layout B or C
Layout A
Layout B
None of the layouts made students happy