Based on the context of the provided responses, if the image depicts a scene related to Spanish missions and the experiences of American Indians, the best-supported generalization would likely be:
American Indians were expected to convert to Christianity.
This response aligns with the historical context of Spanish missions, where the conversion of Indigenous peoples was a primary objective of missionary efforts. However, without seeing the actual image, it's essential to note that other responses might also be supported if the image depicted appropriate visual evidence.