The three most agriculturally productive states in the us are
a.
texas, florida, and ohio
b.
montana, maine, and minnesota
c.
california, florida, and iowa
d.
california, texas, and florida

The correct answer is C:California, Florida, and Iowa

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.