As presented in this chapter, wells that use fracking to recover shale oil ________.
1) Can see production drops of as much as 70
2) Are expensive to drill but have a remarkable ability to maintain a steady flow under pressure for several decades, offsetting the initial cost over the long haul
3) Have greatly increased total oil production in the United States, thus helping to keep global oil prices low
4) Have greatly increased oil production in the United States, but the shale oil producers are hemorrhaging cash
5) A, C, and D only
6) B, C, and D only
