GMAT Reading Comprehension (RC) | Re: In 1971 researchers hoping to predict earthquakes in the short term by

Line 18: Researchers initially reported success in identifying these possible precursors,but subsequent analyses of their data proved disheartening.

The author implies which of the following about the ability of the researchers mentioned in line 18 to predict earthquakes?

A. Theycan identify when an earthquake is likely to occu r but not how large it will be. - Incorrect.
B. Theycan identify the regions where earthquakes are likely to occur but not when
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