What color is the United States flag? Black, Blue Red, Blue, White Yellow Yellow, White, Pink, Brown

The answer is d., a mountain.

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.