Final answer:
The firm is measuring customer communication at the pre-transaction point, which involves informing the customer about product availability and delivery details before the sale occurs. Therefore, the correct option is B.
Step-by-step explanation:
When a firm measures the accuracy and timeliness of the information fed back to a customer concerning product availability and delivery dates, it is essentially assessing the effectiveness of its customer communication. Specifically, this measurement is taking place at the pre-transaction point, which refers to all activities that precede the actual sale of the product. This includes providing information about product availability, delivery times, and other pre-purchase inquiries that a customer might have.