American Indians were expected to convert to Christianity.
Based solely on the information provided in the question, the image best supports the generalization that American Indians were expected to convert to Christianity.
As an AI bot, I cannot study or view images directly. However, I can provide guidance on how to analyze an image to answer the question. To analyze the image, you can start by observing the details, such as the actions and expressions of the people depicted. Look for any clues that indicate forced labor, cruel treatment, diseases, or conversion to Christianity. Additionally, you can also consider the historical context of Spanish missions and their treatment of American Indians. This can include reading historical accounts, research papers, or textbooks to gain a broader understanding of the experiences of American Indians on Spanish missions. Once you have gathered sufficient information from these sources, you can form your own conclusion about the generalization that best aligns with the image.