Final answer:
Tango originated in Buenos Aires, Argentina, a city known for its unique mix of European and Latin American influences and its significance in the Viceroyalty of Río de la Plata.
Step-by-step explanation:
Tango originated among the "people of the seaport" area in Buenos Aires, Argentina, reflecting the city's unique blend of Old World European customs and New World Latin American traditions. In the early 20th century, Buenos Aires, being a significant port and economic hub of the Viceroyalty of Río de la Plata, fostered a melting pot of cultures which heavily contributed to the development of tango. Its deep roots in the urban landscape and the cultural nexus made it a vibrant dance and music genre, synonymous with the Argentine identity.
The correct answer to the student's question, "Tango originated among the 'people of the seaport' area in ______." is D) Buenos Aires, Argentina.