Give more specific information, including dates and names.
Answer: Option B.
Step-by-step explanation:
Since the situation that has been talked about in the question is a situation in which a doubt is shown on one of the employees of the organisation. This situation needs to be studied further and it is to investigated to reach to a conclusion and punish the culprit involved in it.
But to catch the culprit, the investigation is to be done properly and for that certain very important evidences are to be provided which would lead the investigation. So you should for that reason provide the date, the name of the employee, the time and so on.