I would say B) they blow all the time
Because Europeans were explores and they found africa after asia did
The volcano is an elevated structure through which the flows out and cools down and forms a rock
the volcano is of 3 types
Active volcano
dormant volcano
Extinct volcano
when there is a large amount of gas released from the volcano it indicated that the volcano may erupt in the future as the gas may be released from any chemical reaction the stopping of the gas shows the chemical reaction which took place is over or slowed down but it denotes in the near future the volcano my erupt and can cause destruction
hence it is concluded that the dormant volcano can become active with the passage of time
learn more about volcanoes here
brainly.com/question/440765
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