Final answer:
The nursing student made the error of misinterpretation.
Step-by-step explanation:
The error made by the nursing student in this situation is c) Misinterpretation. Misinterpretation occurs when a person misinterprets or misunderstands the actions or behaviors of individuals from a different culture. In this case, the nursing student mistakenly assumed that the Native American client's lack of eye contact was due to a cultural belief about privacy, when it could have been caused by other factors.