Consider the following sets: A = {0} B=0 C = {0, {0}} D= {0, {0}, {0, {0}}} E = {{0}} F= {{0}, {0}} Group A, B, C, D, E, and F into as few groups as possible so that all the members of each group have the same cardinalit Enter your answer as a comma-separated list of groups. (For example, if A, B, C are in the same group, E, F are in the same group different from the group of A, and D is in its o group, enter your answer as "ABC,D,EF" (without the quotation marks). The order doesn't matter.)