Which person is fulfilling a personal responsibility? O Louise is voting in an election.
O Bruno is organizing a political campaign.
O Tamir is attempting to get out of jury duty.
O Nora is keeping her promise to attend a work function.

One drawback of voluntary trade is that it a. requires two groups to use a common language b. can make one group dependent upon another for necessary goods c. doesn't occur unless there is a shortage of goods for at least one group d. forces groups to rely on themselves to produce all the goods they need