What Is China's Policy Toward Education for Children of Urban

What is China's policy toward education for children of urban migrants who came from rural areas?

A) Migrants' children are welcomed in the schools in the cities to which they have migrated.
B) The children must return to their parents' home villages and go to schools there.
C) There is no official policy.
D) Children of migrants must pay tuition that is twice that of children born in the cities.
E) Education is not required for any children.