Choice B, D, & E are out because there's nobody mentioned in the sentence who is doing the act of 'releasing' or 'released.' The noun 'release' is used in A and D and so those two remain. Choice D uses 'when' which doesn't make sense. A is the clear answer!
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Sentence Correction (SC) | Re: Less than 35 years after the release of African honeybees outside Sao
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