`[Co(NH_(3))_(4)(NO_(2))_(2)]CI` exhibits
A. ionization isomerism, geometrical isomerism and optical isomerism
B. linkage isomerism, geometrical isomerism and optical isomerism
C. linkage isomerism, ionization isomerism ane geometrical isomersim
D. linkage isomerism, ionization isomerism ane geometrical isomerism.