Answer:
Option A Apologize for any trouble and explain the change to each customer.
Step-by-step explanation:
The reason is that it is ethicaly correct because the change in policy is not minor, neither involves unethical practice of leg pulling of seniors nor agreeing all the complaints of the customer because he might be totally wrong. The sales person will have to explain the customer what actually the changes are in the policies and why it has adopted it. For the inconvenience caused to the customers, the company must apologize.