Observations from Krakatau and Mt.Pinatubo

Observations from Krakatau and Mt.Pinatubo

A) provide evidence for mass extinctions caused by extraterrestrial events.
B) challenge the notion that extraterrestrial events can cause mass extinctions.
C) demonstrate that volcanic activity can increase global temperatures.
D) demonstrate that volcanic activity can decrease global temperatures.
E) demonstrate that volcanic activity is the major cause of mass extinctions.