Answer: B2B ( Business to business)
Step-by-step explanation:
The Business to business (B2B) is one of the marketing process in which the products are promoted to the other organization or any business by using the various types of business operations or functions.
The business to business marketing plays an important role as it allow various types of organization for expanding the business in the market.
According to the given question, the ABC auto supply is one of the firm that are basically using the E commerce software that allow the users or consumers for ordering their auto parts.
Therefore, The ABC company is basically follows the B2B business model.