thE Aim oF thE voyAgEs mAury wAs rEsponsiBlE For in thE 1840s wAs to ______.
A．mAkE somE sounDing ExpErimEnts in thE oCEAns
B．CollECt sAmplEs oF sEA plAnts AnD AnimAls
C．EstimAtE thE lEngth oF CABlE thAt wAs nEEDED
D．mEAsurE thE DEpths oF thE two oCEAns