Which statement about the northern states in the 1780s is accurate?
their economy was based on agriculture.
they had far fewer large cities than the southern states.
they generally had less enslaved labor than the southern states.
they had very large farms called plantations.

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.