Which of Following Is Not True

Which of following is not true?

A) Inter-bank market participants have a duty to make absolutely clear whether the prices they are quoting are firm or merely indicative.
B) It is the duty of the dealer to periodically confirm with the broker the validity of his price.
C) It is the responsibility of the dealer to ensure that prices given to a broker are taken off if they have not been hit or were subject to a time limit.
D) No deal is done if one counterparty is unable to conclude a deal due to credit line problems and a name switch is not found within a reasonable period of time.