Intro to energy resources and consumption

The graph below shows fluctuations in the global price of crude oil over a twenty year period.

Which of the following statements best explains the change in oil prices between 2008 and 2009?

(Choice A)
A global transition away from oil-based energy and towards alternative energy reduced demand for oil.
(Choice B)
War and civil conflict disrupted global oil production despite a steady need for oil, leaving a shortage.
(Choice C)
A series of extreme weather disasters during this period interrupted the supply of available oil.
(Choice D)
A global financial crisis during this period was characterized by high unemployment and less demand for oil.

AP®︎/College Environmental science