The picture below shows the devils Millhopper sinkhole in Florida. The sinkhole was formed when:

A. River water eroded the soil
B. An underground cavern collapsed
C. A hurricane flooded low lying areas
D. Plant roots caused mechanical weathering of rocks

Sinkholes form when limestone is slowly dissolved by acidic groundwater over geologic time. ... This process of dissolution can create large cavities in limestone. A sinkhole forms when the roof of a cavity in the limestone collapses and creates a depression at the land surface.