thE“ComBinED AgE”oF A group oF pEoplE is thE sum oF thE AgEs oF All oF thE pEoplE in thE group．whiCh oF thE Following group shAD thE grEAtEst ComBinED AgE in 19867
A、20-yEAr-olD mAlEs
B、20-yEAr-olD FEmAlEs
C、60-yEAr-olD mAlEs
D、60-yEAr-olD FEmAlEs
E、80-yEAr-olD FEmAlEs