The rain has flooded drainage canals in many orange-tree groves, which has caused the fruit to fall before it ripen and also threatened to kill the trees.
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Awhich has caused the fruit to fall before it will ripen and also threatened to kill
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Bwhich not only caused the fruit to fall before ripening, but also threatened killing
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Cnot only causing the fruit to fall before ripening, but also threatening to kill
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Dcausing the fruit to fall before it will ripen, which will threaten killing
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Ecausing the fruit to have fallen before it ripened, which threatened to kill
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