Free trade is again under attack, despite having been, for over a century, the basis of America's wealth. Some groups in the United States blame free trade for leading to the loss of manufacturing jobs, while others blame it for exposing some U.S. producers to foreign competition. Free trade, however, is good for America, and for a very simple reason: it allows American workers to specialize in goods and services that they produce more efficiently than workers in the rest of the world and then to exchange them for goods and services that workers from other countries produce at higher quality and lower cost. Specialization and free trade allow the U.S. to become more competitive and innovative. Innovation constantly provides new technologies that allow Americans to produce more, cure more diseases, pollute less, improve education, and choose from a greater range of investment opportunities.
The resulting economic growth generates better-paying jobs, higher standards of living, and a greater appreciation of the benefits of living in a peaceful society.In the argument given, the two portions in boldface play which of the following roles?
A) The first is a circumstance, the implication of which is at issue in the argument; the second provides support to the main conclusion that the argument seeks to establish.
B) The first is a circumstance, the implication of which is at issue in the argument; the second is the main conclusion of the argument.
C) The first is a claim, the accuracy of which is at issue in the argument; the second provides evidence that contradicts this claim.
D) The first is a position that the argument seeks to explain; the second provides evidence to support the main conclusion that the argument seeks to establish.
E) The first is an opinion, the consequence of which is at issue in the argument; the second provides support to the main conclusion that the argument seeks to establish.