What events caused the decline of the Abbasid dynasty? A. The Abbasids willingly gave up their lands to the Seljuk Turks and the Mongols.
B. The Abbasid empire fragmented, and other peoples gained control.
The invaders from Spain created small kingdoms throughout the former empire.
D. The Umayyads and the Abbasids waged a civil war that destroyed the empire.

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.