sEvErAl CEnturiEs Ago, spAniArDs AnD portuguEsE CAmE to thE AmAzon rivEr ArEA to _________.
A．plAnt trEEs
B．hElp thE nAtivE inDiAns
C．ColonizE thE ArEA.
D．look For nEw rEsiDEntiAl plACEs