大货样的英文是（）

A．A recent history of the meat-packing industry.
B．Historical sources for the late nineteenth century.
C．Data from some researchers.
D．Workers who used to work in the meat-packing industry.

A．the efforts of social workers to improve sanitation in the packinghouses.
B．improvements in the industry’s packing process that occurred in the 1880’s.
C．the workers’ ability to perform the industry’s complex tasks.
D．the workers’ determined complaints about the rate and conditions of their work.

A．present evidence that is intended to refute the argument of the history discussed.
B．summarize the main point of the history discussed in the passage.
C．explain why the history discussed in the passage has been blamed by critics.
D．introduce a hypothesis that will be discussed in detail later in the passage.