Premise: Soundgarden . Soundgarden was the first grunge band to sign to a major label ( A&M Records in 1988 ) , though the band did not achieve commercial success until they popularized the genre in the early 1990s with Seattle contemporaries Pearl Jam , Nirvana , and Alice in Chains .
Hypothesis: The grunge band Soundgarden signed to A&M Records in 1988.
Label: ENTAILMENT