Members of Controlled Groups. R, U, S, and T Corporations each have only one class of outstanding stock. Given the stock ownership of these corporations by the four unrelated individuals indicated below, indicate which of the corporations are members of controlled groups. Corporations Individuals R U S T A.... 30% 5% 40% 50% B 10 10 10 20 C.. 40 5 10 10 D.... 20 80 0 20