What cultural elements did Ned have to sacrifice at Rehobeth Mission School?

Ned had to sacrifice his language, culture, hair, clothes, and jewelry at Rehobeth Mission School, which is reflected in the correct choice. This choice conveys the extent of the assimilation pressures faced by Native American students in mission schools during that era. These institutions often operated under the belief that Indigenous people needed to abandon their cultural identities to integrate into mainstream American society.

The requirement to cut hair and adopt Western clothing was part of a broader strategy to strip away Native American identity and enforce conformity to Euro-American norms. Additionally, the emphasis on suppressing one's language and cultural practices aligned with these assimilation goals, aiming to limit the expression of his heritage completely. This comprehensive loss highlights the severe cultural impacts of such educational systems and the sacrifices imposed on individuals like Ned.