C Self-determination ;Freedom of the people of a given area to determine their own political status
Improved technology allows to create more goods and to increase the efficiency of providing services (answer d.) and this is they way that it increases standards of living. If there are more goods and services then more people have an access to them.
Because traditional economies are characterized as being primarily agricultural, they are prone to stagnation since they rely heavily on weather, which can be unpredictable and pragmatic.