Which of these songs was a USA #1 hit during the 1980s?

Oddly enough that of these four hits, "Seasons Change" by the Miami-based freestyle trio, Exposé, was the only one to hit #1 on the Billboard Hot 100, doing so back in early 1988. The track was the all-female group's fourth single off their album, "Exposure", with their first three singles all hitting the Top 10 in 1987. The aforementioned track is also their only #1 song.

Exposé began in Miami in 1984 consisting of Sandra Casañas, Alejandra Lorenzo, and Laurie Miller, but all three of them were apparently let go in 1986. According to conflicting reports, Arista Records did not see any star potential in them, and there was also one that the three women disbanded on their own terms. In 1987, Exposé broke through with the lineup of Jeanette Jurado, Ann Curless, and Gioia Bruno. After a string of success, Bruno left the group in the early 1990s, being replaced by Kelly Moneymaker.