Why are open coal mines (strip mines) more likely to result in acid mine drainage than are underground mines?
A. Archaea such as Ferroplasma acidarmanus that produce acid from ore only live aboveground.
B. Rainwater can leach acids from strip mines but not from underground mines.
C. Air exposure increases the oxidation rate of sulfur and iron by bacteria, and oxidized sulfur or iron can combine with rainwater to form a strong acid.
D. Strip mines have more iron- and sulfur-containing minerals that may be oxidized by acid-producing bacteria.
C. Air exposure increases the oxidation rate of sulfur and iron by bacteria, and oxidized sulfur or iron can combine with rainwater to form a strong acid.
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