Banker: By transferring income to a retirement account at our bank, people can save money by delaying…

The correct choice is: “The Banker and the Accountant disagree on the application of the term “save”.”

Both speakers agree on the facts: the tax is deferred now and paid later on withdrawal. They disagree only about whether that counts as “saving” money. For the Banker, postponing a payment (keeping the money invested meanwhile) is a saving; for the Accountant, money is saved only if the total tax paid is reduced. The conflict is therefore about the meaning of the word “save”.

The Banker’s motive of recruiting customers does not explain the disagreement in their reasoning. Nothing shows that the Accountant misunderstands the tax laws; the Accountant’s statement that the tax is paid on withdrawal is consistent with the Banker’s. A future change in the law on retirement accounts is irrelevant to the present disagreement.