Final answer:
The act of putting a baby to sleep in its own room may be seen as immoral or inferior by someone from another culture, as sleeping arrangements are a cultural norm that varies widely across societies.
Step-by-step explanation:
The American norm that might be seen as immoral or inferior by someone from another culture is C) putting a baby to sleep in its own room. In some cultures, close family sleeping arrangements are the norm, and the idea of a baby sleeping separately from its parents may be viewed with disfavor. Cultural norms surrounding family and childcare are highly variable, and practices that are commonplace in one society can be controversial in another. This norm directly relates to patterns of rest and sleep that have varied historically and across societies. Furthermore, infant care practices and recommendations like the importance of sleep position for avoiding Sudden Infant Death Syndrome (SIDS) highlight differences in how various cultures approach child safety and parenting styles.