What Is the Rationale for Government Provision of Education

What is the rationale for government provision of education?  

A)  Not all incomes are equal, but everyone has the right to education regardless of wealth. 
B)  Students consider only the personal benefits gained from education, but the rest of society benefits too. 
C)  The private sector is not as efficient as the public sector. 
D)  The government can provide education at a much lower cost than the private sector.