Select the correct answers. Which two farming advances developed during the Zhou dynasty?
iron plow
fertile silt of Huang He River
bronze tools
crop rotation

Which of the following world and national events led to a new view of people with disabilities in the us:     a.  world war i and ii veterans with disabilities returned home after the wars.b.  john f. kennedy was elected president and had a sister with a disability.c.  the civil rights and feminist movements.d.  all of the above.