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"<span>D. Vikings conducted raids and trading expeditions from the Irish coast to the Caspian Sea" is the best option from the list because this was their main source of revenue. </span>
Because we let anyone with money into the system and they elect other people with money. pretty much its because of money
Answer:
researchers can use that decay as a kind of clock that allows them to peer into the past and determine absolute dates for everything from wood to food, pollen, poop, and even dead animals and humans.
Explanation:
