NEED HELP QUICK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The table below shows the age of fossils found in four separate layers of an undisturbed rock:


Fossils In Rock Layers
Layer Fossil in Layer Age of Fossil (million years)
A W 550
B X 240
C Y 680
D Z 450


Which is the topmost layer of the rock?
Layer A
Layer B
Layer C
Layer D