Why were us workers against the ratification of the north american free trade agreement (nafta) in 1992?
a. they worried about losing jobs to developing countries where workers could be paid less.
b. they were worried that their employers would have more business, creating a labor shortage.
c. they did not want an increase in mexican agricultural workers immigrating to the united states.
d. they disagreed with canada's politics and did not want to trade with canadian businesses.