Members of the common-school movement believed that all children should learn in the same place regardless of their backgrounds. receive the bulk of their education at home. learn a trade in school rather than study academic subjects. attend school for eight hours a day, every day.

 Learn in the same place regardless of their backgrounds.

Explanation:

The common school movement advocated for a larger role for public education.  For a long time in the early era of United States history, the dominant belief was that free, public education was only for the poor, and that private schools were the best choice for a better education.

Horace Mann was an educational reformer who was a leader in the common school movement that took hold in the 1830s.  Mann championed the idea that universal public education -- common schools for all children regardless of their social class, religion, or other background factors -- was essential for building a strong society.

a and c?

i think it is a and c