Which event is most likely if an index fossil is found in a layer at location 1, but the layer and index fossil are not found at

Question

3 years ago

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Which event is most likely if an index fossil is found in a layer at location 1, but the layer and index fossil are not found at

location 2 nearby, which is known to be the same relative age?
The layer at location 2 is too old to contain fossils.
The locations were too close together.
The organism did not exist at location 2.
The layers at location 2 formed much earlier than those at location 1.

Biology