Classical Liberals See the Role of Government as a Night

Classical liberals see the role of government as a night watchman.What does this mean?

A) The state should be involved in the economy, not in the military.
B) The state should be involved in the economy and the military, but not in the judicial process.
C) The state should not be concerned with property protection.
D) The state should not be involved in society to any large degree and therefore should be limited.
E) The state should intervene to promote equality of opportunity.