(a) The rule that requires the mates are chosen within some specified group
(b) Mates may be chosen within the same group
(c) Mates be chosen within the same family
(d) None of these
(a) The rule that requires the mates are chosen within some specified group
(b) Mates may be chosen within the same group
(c) Mates be chosen within the same family
(d) None of these