Explanation
This question sounds oddly general. But we know that the
correct answer will be supported by the passage and maybe even required by the
statements of the passage. Choice (A) has not even been hinted at by the
passage, much less required. Choice (B) is inaccurate, because successes in
predicting earthquakes have been described. Choice (C) may be accurate. If both
methods involve looking at fault lines, then (C) would be a correct answer to
the question. The stress transfer theory makes reference to "locations along
the fault" (lines 23-24), and, secondly, the rival technique makes use of "the
lack of foreshocks along faults" (line 32). So answer choice (C) is supported.
Choice (D) is plausible but not supported by the passage. Choice (E) is a
plausible statement and might be true, but even it if were certain, it would be
a consequence of the modern methods,
not a fact on which the methods are based.
The correct answer is (C).
Passage 20
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