To Separate a Mixture of P-Toluidine and P-Nitrotoluene Dissolved in Ether

To separate a mixture of p-toluidine and p-nitrotoluene dissolved in ether,

A) extract the ether solution with aqueous HCl and treat the water layer with aqueous NaOH.
B) extract the ether solution with aqueous NaOH and treat the water layer with aqueous HCl.
C) extract the ether solution with water and treat the water layer with aqueous NaOH.
D) extract the ether layer with aqueous HCl and treat the ether layer with aqueous NaOH.
E) extract the ether solution with aqueous HCl and treat the ether layer with aqueous HCl.