Sometime between the 1200s and 1400s traders brought a new to southeast asia?
a. religious influence
b. political system
c. economic system
d. ethnic group

>>>>>>>>>>C.economic system<<<<<<<<<

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.