Every decision involves trade-offs because Aeveryone has to make decisions.
B everyone's resources are limited.
C some people have more money than others.
D some decisions are made for business, others for society.

B everyone's resources are limited

Explanation:

A trade-off will involve selecting one option from a variety of choices. In a trade-off, one has to forfeit one alternative to enjoy the other. A trade-off is the same as the opportunity cost. The cost of trade-off is expressed as the foregone benefit from the next best alternative.

A trade-off exists because people have to choose the best way to use their limited resources to satisfy unending needs. The few available resources, including time and money, cannot satisfy individuals' and households' needs and wants. People have to prioritize their needs and allocate resources accordingly. Both individuals and firms will often decide to cater to their most pressing needs first. By making those decisions, a  trade-off is created.

answer; (consensus);

so they can see what that city is producing and to also see if they can some how get that product. like gold in africa.