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Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

After considering options, a student using the problem-solving process should next

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade