Question

read the excerpt from fast food nation.
the labor practices of the fast food industry have their origins in the assembly line systems adopted by american manufacturers in the early twentieth century. business historian alfred d. chandler has argued that a high rate of throughput was the most important aspect of these mass production systems. a factorys throughput is the speed and volume of its flow—a much more crucial measurement, according to chandler, than the number of workers it employs or the value of its machinery.
which of the following choices best describes the evidence used in this excerpt?
an experts opinion provides historical background of an important concept.
an experts viewpoint presents a counterclaim to the authors argument.
statistical and factual evidence prove the authors claim.
personal experience creates persuasive, emotional appeal.

Explanation:

The text uses an expert (Business historian Alfred D. Chandler) to explain the historical background of "throughput" in mass - production systems. There are no counter - claims, no statistical/factual data (like numbers or specific facts), and no personal experiences.

Answer:

A. An expert's opinion provides historical background of an important concept.