Which events are 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? Select three options.

The layer never formed at location 2.
The locations were too close together.
The organism did not exist at location 2.
The missing layer at location 2 may have eroded.
The layers at location 2 formed much earlier than those at location 1.