challenge: What was the primary goal of the Portuguese invasion of the Banda Oriental from 1811 to 1812?
  
  A. To provide military aid to the Spanish Viceroyalty
  B. To colonize the region with Portuguese settlers
  C. To annex the remaining territory of the Spanish Viceroyalty of the Río de la Plata
  D. To establish a trade agreement with the Spanish Viceroyalty
  Answer: 