Sparta joined with Athens because Sparta was . a.
too weak to confront the Persians alone.
c.
afraid that Persia threatened Spartan miltary control of Greece.
b.
planning defeat the Persians first and then attack Athens.

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.