Final answer:
The Custom Frames and Mats store transmits the order once every day.
Step-by-step explanation:
The answer to the question is a) day.
Custom Frames and Mats store transmits the order once every day. This means that the store sends out the order on a daily basis. For example, if you place an order on Monday, it will be transmitted on Tuesday. This frequent transmission ensures efficient processing and delivery of the orders.