Why Were Laws Requiring the Education of Children Difficult to Enforce

Why were laws requiring the education of children difficult to enforce?

A) Most governments feared that educated citizens would be converted to socialism.
B) Families of farm laborers and unskilled urban workers were too mobile.
C) Many poorer parents needed their children's help with farmwork or domestic tasks.
D) Churches pressured families to send their children to church-run schools instead of state schools.