this one is dicy

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by mankey » Fri Nov 11, 2011 9:04 am
IMO: C. What is the OA?

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by saketk » Fri Nov 11, 2011 9:11 am
it should be E. when the plant reaches maturity [towards end of life] the level of the chemical goes down. this is the clear sign that the chemical plays an important role in the growth of the plant

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by tuanquang269 » Sun Nov 13, 2011 6:45 pm
+1 for E