Final answer:
Option A is a use of logos as it provides a factual and logical example of the dangers in a meatpacking plant. Option F appeals to pathos by vividly describing the physical injuries of the workers, eliciting an emotional response.
Step-by-step explanation:
The rhetorical appeal to logos involves presenting a logical argument with clear, credible evidence and avoiding exaggeration or unsupported claims.
For example A, "...their peculiar trouble was that they fell into the vats; and when they were fished out, ….—sometimes they would be overlooked for days, till all but the bones of them had gone out to the world as Durham's Pure Leaf Lard!" utilizes startling facts and imagery that highlight the logical consequences of unsafe working conditions, thus making it an effective use of logos.
On the other hand, example F, "...you could scarcely find a person who had the use of his thumb; time and time again the base of it had been slashed, till it was a mere lump of flesh against which the man pressed the knife to hold it," vividly evokes a strong emotional response by describing the physical toll on workers, which aligns with the rhetorical appeal to pathos. Option a