Answer:
D) allowing local school systems to decide how and when to desegregate their schools.
Step-by-step explanation:
During the civil rights movement of the 1960s, the Sibley Commission recommended allowing local school systems to decide how and when to desegregate their schools.
At the height of the civil rights agitation in the United States in 1960, Sibley made a recommendation that the state would accept the federal decision to desegregate the schools.