What is the main difference between risk and uncertainty? A. risk refers to the unique outcomes that can be assigned probabilities, whereas uncertainty refers to those outcomes that managers choose to ignore because they cannot be assigned probabilities. B. risk refers to unique consequences that can be assigned probabilities, whereas uncertainty implies that it is not fully possible to identify outcomes or to assign probabilities. C. uncertainty refers to unique consequences that can be assigned probabilities, whereas risk implies that it is not fully possible to identify outcomes or to assign probabilities. D. risk and uncertainty, in the context of investment appraisal, mean the same thing.