The monroe doctrine was largely a response to the problem of
a. the debate over admitting slavers states into the union
b. the interest of european nations in creating colonies in north and south america
c. fighting between western settlers and native americans

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.