Explanation
This question asks us to make a general inference, so the
author's main point can be our primary guide. We will look for a statement that
must be true, according to the
passage, since such a statement will be best supported. Choice (A) is the
opposite of the author's thesis, so it's out. Choice (B) is a distortion of
what the passage says. The passage claims that most companies will have
optimized their staffing structure, but the invariability of their staffing
structures in itself is not required by or helpful to their competitiveness. So
(B) is out. Choice (C) is implied by the passage, which says that a wage hike
"will tend to affect a company's bottom line without altering its staffing
structure" (lines 8-10). (C) is looking good. (D)
makes a claim that is not clearly supported by the passage and probably
contradicts the passage; for example, if (D) were true, companies would tend
not to be affected by the wage hike and the claim in lines 8-10 would be
contradicted, as the bottom line wouldn't be hit. So (D) is out. Choice (E)
also is a distortion of the passage. At the end of the passage, the author
admits that there are differences between company practices and industries but
makes a claim contrary to the idea that they are "inconsistent"; rather, they
are different but consistent according to the "specific calculation" by which they
are, generally, optimized. So (E) is out.
The correct answer is (C).
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