What concepts were developed in the ancient world to make sure trade was fair? scarcity and surplus
supply and demand
standard measures and weights
traditional and command economies

standard measures and weights

Explanation:

In the Ancient World, states and nations had different measures and weight systems, they also had vastly different languages and curriences.

In order to solve this problem, and facilitate trade, some forms of standard measures and weights were invented, which applied to specific geographic areas.

The same applies to currency, where some currencies became tradable in vast geographical regions that were larger than state borders.

C!

Explanation:

a) it is located in central mexico.

answer is b shrapnel injuries