Final answer:
The sales associate should inform the customer that a. per store policy, personalized items like monogrammed towels are non-refundable to ensure the customer is aware of the implications of their purchase decision.
Step-by-step explanation:
The store policy on monogramming is very specific, and it is important to communicate it effectively to the customer.
As a sales associate, you should say, a."Please be aware it is our store's policy that personalized items cannot be returned."
This statement clearly informs the customer that once the towels are personalized with a monogram, they are not eligible for a refund due to the customization.
It is necessary to make sure that the customer understands the ramifications of their decision to personalize the towels before they proceed, helping prevent any confusion or dissatisfaction afterwards.