Why was the Wagner Act so contentious for many Americans?

Prices for products became more affordable as a result of new forms of ,witch got things to market faster and cheaper

Which political reform gave people the power to put a proposed law on the ballot? referendum initiative direct primary recall

Which environmental change allowed people to travel by land between asia and north america a.human apaption to arctic environments b.the introduction to horses to north america c.the formation of ice sheets on land d.a rise in ocean temperatures