The answer is B. Hope this helped
The involvement of an entire society in a was effort is known as TOTAL WAR.
A total war is a kind of war that involve all the sectors of the society, which are made up of men, women and the children. Such a war usually mobilizes all the resources in the society to fight the war and the government give priority to the warfare over non combatant need. The first modern total war is the first world war.<span />
The best option from the list would be that "Horace Mann" is best associated with education reform in the U.S., since he sought to reform the system before "reform" in the realm of education was popular.