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Question
Which oil recovery mechanism yields the most oil andis the most efficient oil recovery mechanism?
Options:
A .  Selective plugging by microorganisms and their metabolites
B .  Oil viscosity reduction by gas production
C .  Production of acids by dissolving minerals in the rock
D .  Degradation of long-chain saturated hydrocarbons
Answer: Option A
Answer: (a).Selective plugging by microorganisms and their metabolites
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