The civil rights struggle in the 50's and 60's won public support partly owing to ______.

A．the natural development of children's intelligence
B．early intervention in children's intellectual growth
C．providing enough day-care centers for children of working mothers
D．depriving poor mothers of the opportunities to raise their children at home

A．educational day-care centers are the best place for children to grow up in
B．parents fail to provide an adequate environment for their intelligence growth
C．the age of 12 is a critical point in time for intellectual development in children
D．intellectual development and academic achievement of children are closely related

A．eliminated any kind of censorship of broadcast news
B．encouraged news coverage of the Vietnam War and ended it
C．proclaimed the Pentagon's control over the media unconstitutional
D．made the transgression of human rights a global focus in broadcast news