UK: Who is to blame for the soaring oil price?

With the oil price at near-record highs and Shell (RDSB) and BP (BP) declaring record profits last week, there are various truckloads of drivel about the oil majors being ruthless profiteers doing the rounds at the moment.
But who

With the oil price above $100 a barrel, who makes the most money out of a gallon of petrol at the pump? Is it:

A. Greedy oil companies.
B. Greedy Opec members.
C. Our glorious Government.