Stable political conditions and freedom (from) foreign invasion enable a country to develop its natural resources peacefully and steadily, and (to produce) more wealth than (the other) country equally well served by nature but (less well) ordered.

A．can process anything but digital data
B．can even process television images
C．are rarely used in education
D．have few business applications

A．demands a greater initial speed than a lighter one
B．demands as great an initial speed as a lighter one
C．must be made lighter than its original weight
D．has to overcome a greater gravity than a lighter one