If Sedimentary Layer A occurs above Sedimentary Layer C and Sedimentary Layer B is below Sedimentary Layer C, which of the following is the correct order of the layers (from oldest to youngest)?

"The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top."

Oldest to youngest: Layer B, Layer C, Layer A

The oldest is always at the bottom, the youngest layer is at the top

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