The project that you are in charge has been successfully completed

The project that you are in charge has been successfully completed.The last of the deliverables have been formally accepted by the client.You had several contractors with whom contracts were prepared.With the project done you decide to communicate the completion details and closure of contracts.Which is the best form of communication?
Correct Answer : A
As this is related to a contract it must be a formal written form of communication.Any other form of communication related to contracts is not acceptable.