One Drawback of In- Situ Recovery Techniques Is ________________

Multiple Choice

One drawback of in- situ recovery techniques is ________________.

A) the potential for soil compaction from the heavy equipment requires
B) that the land is often not reclaimable after mining operations cease
C) that although the techniques are scientifically feasible, they are not economically feasible
D) the potential for leakage of acids into groundwater
E) that the technique often results in severe erosion, especially in steep areas