Which pairs of compounds can react together to undergo condensation polymerization reactions?

I.      ${\text{HOOC–}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{4}}}{\text{–COOH and }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}$

II.     ${{\text{H}}_{\text{2}}}{\text{N–(C}}{{\text{H}}_{\text{2}}}{{\text{)}}_{\text{6}}}{\text{–N}}{{\text{H}}_{\text{2}}}{\text{ and HOOC–(C}}{{\text{H}}_{\text{2}}}{{\text{)}}_{\text{4}}}{\text{–COOH}}$

III.     ${{\text{H}}_{\text{2}}}{\text{N–C}}{{\text{H}}_{\text{2}}}{\text{–COOH and }}{{\text{H}}_{\text{2}}}{\text{N–CH(C}}{{\text{H}}_{\text{3}}}{\text{)–COOH}}$

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

C