The Steep,upper Slopes of Composite Volcanoes Are Generally Produced by ________

The steep,upper slopes of composite volcanoes are generally produced by ________.

A) large landslides
B) high-viscosity,low-volume silicic magmas that are erupted from the summit
C) satellite or parasitic cones that push up the top of the volcano to steep slopes
D) tilting of the summit by intrusion of high-viscosity magma directly below the summit