14. The following are bases used by PHIVOLCS to identify if the volcano is active, except:
a The volcano has erupted within historical times
b. There are documentations of the eruption of the volcano
c. The volcano has erupted at least once within 10,000 years
d. The volcano has no historical records of eruption
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Answer:
D
Explanation:
Because letter A,B and C gave similar thoughts that an active volcanoe already erupted within an specific time frame. But letter D concluded that an active volcano has no historical record which is wrong.