Answer:
The correct answer is option B. "sending children to boarding schools".
Explanation:
Native American boarding school were institutions at which children and youth Native Americans were educated into the Euro-American culture. These institutions were established in the late 18th century, and by the 1960, most of the boarding schools were closed and replaced by day schools in Washington. Therefore, Native Americans in Washington did not sent their children to boarding schools during the 1960s.
