Why is the fossil record not complete?
Rocks and the fossils they contained have eroded and disappeared.
Most organisms decomposed after death.
Many species lacked hard structures.
Many organisms were eaten by scavengers after death.

the answer would be d

option a and d is the correct answer

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you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.