Can someone help me out these are my finals and i dont know

Secondary succession would most likely be taking place in a(n)

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Which layer will become saturated first when rain falls?