1. Which of the following statements are in line with the text?
I. Lava is magma coming out from the earth's crust
II. The gases trap magma under the surface of teh Earth
III. A high-viscosity magma tends to results in an explotion
IV. An eruption pulse involves explotions fro a few seconds
A. I and II
B. I and III
C. II and III
D. II and IV
Kunci jawaban: B