What Is a Critical Difference Between Surface and Subsurface Mining

Multiple Choice

What is a critical difference between surface and subsurface mining?

A) Surface mining is more expensive than subsurface mining
B) Surface mining is above ground; subsurface mining is below ground
C) Surface mining causes less environmental damage than subsurface mining
D) Subsurface mining creates acid mine drainage; surface mining does not
E) Subsurface mining has the potential for dangerous landslides; surface mining has the potential for cave-ins