This question is highly flawed or missing something important. How can we determine what has happened based solely on the information provided in the question?
Many participants are suggesting C as the answer, but how can we deduce from the given scenario that the "legal department has not disseminated" the information?
It could be "legal department has disseminated". Then it was due to A, or D could also be a possibility. Additionally, B could be the answer as well.
Ultimately, based on the sentences provided in this question, we cannot infer anything. Therefore, I consider it a highly flawed question, and any of the options could be the answer or none of them could be the answer.