Which headline is the best example of an opinion?

a,) fierce grizzly attacks innocent bystanders
b.) mountain lion killed in connecticut
c.) twenty wounded in seattle shooting
d.) lightning strikes local restaurant

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.