A) in an effort to fund a second refining facility nearby, the oil refinery that serves the majority of the gas stations in Albemarle County raised its prices.
-This doesn't explain why people are buying despite an increase. It only sheds light on why gas prices have increased
B) A marketing strategy devised by a powerful environmentalist interest group has inspired many commuters who normally drive to work alone to organize car pools with coworkers.
-This doesn't really explain anything ı would expect car pooling to lower the amount of oil used
C) A statewide strike of all commercial and commuter railway workers has brought all rail traffic to a halt.
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Correctİf railway workers are on strike it means people will not be able tot ravel with trains etc. They will use their personal vehicles or just turn to taxis etc. This will surely increase the demand for oil although oil prices have increased
D) Drivers are also purchasing more cans of heavy-grade oil, even though the price per can has remained virtually unchanged.
-it says price per can didn't change but we are given that prices have increased by %20
E) Almost no one who lives within Albemarle County also works within Albemarle County.
-Irrelevant. It doesn't matter where people live and work