You receive a call from a person who identifies themselves as an old friend of a former client, seeking their address. The client has in fact passed away. The old friend appears to have a good claim to a share of the estate of the deceased. Your knowledge of the deceased’s will would enable you to obtain a favourable settlement. Which of the following best represents your obligations towards the former, now deceased, client?

A、 You are permitted to use information acquired about a former client’s affairs for the purposes of another client
B、 You must not disclose details of a former client’s new address, even if a person telephones to ask for this information and identifies himself as an “old friend” of the client
C、 You must keep your client’s affairs confidential until the client dies
D、 You must not disclose information about a former client’s affairs even if the latter has authorised such disclosure
E、 The duty of client confidentiality is not absolute and ends after termination of the retainer