Which system of government gives all powers to the national government

Centralization is the surrender of power
and authority of government to the central

The answer is c, i, iii, and iv. this is because farming and mining deal with harvesting raw materials, construction work falls under manufacturing, and piloting a plane is a service. ii is wrong because making bread is using  raw materials to produce goods, which would fall under the secondary sector, not primary.

Intrusion is the best answer and the newest form.