4. PART B: Which piece of evidence from the text BEST supports
the answer to Part A?

A. "Josh Fox is the movie's director and writer. He argues
that the tap water flames were likely fueled by methane."

B. "This technology has the potential to open up new
underground reservoirs of an important fossil fuel. This natural
gas burns more cleanly than coal or oil."

C. "This Colorado Oil and Gas Conservation Commission
issued a report in 2010. It described evidence suggesting that
underground coal seams might be the source of methane in the
homeowner's water, not a fracked gas deposit."

D. "Fox and other critics argue, however, that fracking also
introduces new and potentially dangerous environmental risks.
The gas industry and a number of scientists disagree. They argue
that fracking is not new and that, if done appropriately, poses no
major risks."