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Experts estimate that ten times as much petroleum exists in sources like tar sands, heavy oil, and perhaps even in shale than in conventional reservoirs.
A. sources like tar sands, heavy oil, and perhaps even in shale than
B. sources like tar sands, heavy oil, and perhaps even in shale than are
C. such sources as tar sands, heavy oil, and perhaps even in shale as are
D. such sources as tar sands, heavy oil, and perhaps even shale as
E. such sources as tar sands, heavy oil, and perhaps even shale than
OA D
Source: GMAT Prep
A. sources like tar sands, heavy oil, and perhaps even in shale than
B. sources like tar sands, heavy oil, and perhaps even in shale than are
C. such sources as tar sands, heavy oil, and perhaps even in shale as are
D. such sources as tar sands, heavy oil, and perhaps even shale as
E. such sources as tar sands, heavy oil, and perhaps even shale than
OA D
Source: GMAT Prep
