Hyperaccumulators Are Plants That ________

Hyperaccumulators are plants that ________.

A) can survive on metal-contaminated soil by growing without taking in too much of the metal in question
B) are extremely sensitive to the toxic effect of certain heavy metals and therefore act as an early warning system to detect contamination
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