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4. What do the archaeological discoveries at East Wenatchee, Manis farm, and the Marmes dig
have in common?

A They prove that the land bridge theory is correct.

B They provide evidence that there were ancient hunters in Washington.

C They indicate that Native Americans arrived just before Europeans.

D They suggest that mastodons were hunted to extinction.

Which suggests the most critical aspect of the peak oil theory? 1) controversy rages over rumors that the fracking lobby in washington has influenced the statistics. 2) supporters and critics argue endlessly over the rate of extraction and shape of the bell curve. 3) saudi arabia will soon have to begin fracking, leading to protests and further destabilization. 4) a new oil discovery means a fresh peak cycle, making that region the target of aggressors.