SS Cap Polonio's destination port was the leading transshipment point for foreign trade of which country in South America?
SS Cap Polonio:  She worked the Hamburg Südamerikanische Dampfschifffahrtsgesellschaft ("Hamburg South America Steamship Company") route between Hamburg in Germany and Buenos Aires in Argentina. Port of Buenos Aires:  Operated by the "Administración General de Puertos" (General Ports Administration), a state enterprise, it is the leading transshipment point for the foreign trade of Argentina.
Argentina