Which of the Following Disclaimers Is Least Likely to Form

Which of the following disclaimers is least likely to form part of the contract?

A) A disclaimer set out in a written contract that has been signed by the customer.
B) A disclaimer brought to the attention of the customer as soon as the customer complains about the service provided.
C) A disclaimer implied into the contract as a result of prior dealings between the parties.
D) A disclaimer brought to the attention of the customer before the contract was formed.