Stewed Tomatoes was an "all-girl power-pop trio." Its three members realized that many musicians feel stifled when making music in a sterile studio environment while the clock ticked away expensive hours, so the three girl band members created Materville Studios, a multimedia production house and recording studio in downtown Chicago. They share work responsibilities and profits equally. Materville Studios is a(n): O Scorporation O cooperative sole proprietorship partnership double proprietorship