The sentence from the passage contains objective language is (c)"Instead of hiring workers to perform tasks on an assembly
line, factory owners used automated machines that could do
the work of several people." (paragraph 5)
This refers to the use of words that is free from bias and makes use of facts only that can be verified.
Hence, we can see that although the complete text is not provided, I can make an inference about the objective language used and this would be option C because it states it in a matter-of-fact manner.
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