Which of the following conclusions can you draw based on the data in the chart

How many people in the world’s economy work in “system d”?

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

Which of the following was not a result of early humans increasing proficiency at finding food