Outsider Industries S.a.r.l. is a company that is organized in Luxembourg. It is not a per se corporation for U.S. tax purposes. Under Luxembourg law, no member of a S.a.r.l. has unlimited liability. If Outsider Industries S.a.r.l. has three owners, what is its default entity classification for U.S. tax purposes under the check-the-box regulations? a) Corporation b) Partnership c) Disregarded entity d) None of the above