Sinkholes and Karst Topography Are a Clear Indication That ________

Multiple Choice

Sinkholes and karst topography are a clear indication that ________.

A) the groundwater is moving through cracks in the rock
B) the groundwater is moving through a limestone and forming caves that periodically collapse
C) the area has been subjected to past meteorite bombardments and groundwater is moving through the fractured rock
D) there is nothing unusual; these features occur everywhere there is fast motion of groundwater in the subsurface