What Weather Conditions Are Most Likely to Foster the Formation

What weather conditions are most likely to foster the formation of sinkholes?

A) dry weather, because that dehydrates the soil, causing shrinkage and collapse
B) freezing weather, because freezing water expands, causing stresses that force fractures apart to collapse
C) dry weather, because that lowers the water table so the cavern roofs are not supported and may collapse
D) wet weather, because there is ample water to dissolve out caverns
E) wet weather, because the pressure of water in a cavern causes stress that can weaken and collapse the roof