In a mercantilist system, a country tries to increase its and decrease its
a. manufacturing; agriculture
b. agriculture; manufacturing
c. exports; imports
d. imports; exports

In a mercantilist system, a country tries to increase its "exports" and to decrease its "imports," since this means that the country is making more than its spending (at least in theory). 

That president would be none other than president warren g harding , return to say of life before wwi

Because broadest terms allows the law flexibility depending on changing society and circumstances.