They cleared the pathways with axes and made markings for the warriors to follow
Raising crops to be sold is called commercial farming
<span>The
economist Julian Simon bet in 1980 that the prices of five free traded
commodities would decline in ten years. In 1990 Simon won this bet against
the neo-Malthusian Paul Ehrlich.</span>
D. Spices and Silk
That is most likely the correct answer
They check there answers using history, like they use primary sources etc.
