Hyperaccumulators are plants that ________
A) are extremely sensitive to the toxic effect of certain heavy metals and therefore act as an early warning system to detect contamination
B) can survive on metal-contaminated soil by growing without taking in too much of the metal in question
C) take up extremely high amounts of certain metals without being harmed
D) accumulate dense root mats just above the layer of polluted soil
E) none of the above
C
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