Final answer:
The marketing function illustrated by Mass Furniture Warehouse arranging credit for clients to facilitate furniture purchases is financing. This strategy helps customers secure the funds needed to buy products and supports sales.
Step-by-step explanation:
In the scenario presented by Mass Furniture Warehouse, the company is engaging in a marketing strategy that involves arranging credit for its clients to facilitate their purchases. This practice aligns with the financing function of marketing, which aims to ensure customers have the necessary funds to buy a company's products, thus smoothing the path to purchase and potentially boosting sales. Financing is a crucial aspect of the marketing mix that can directly influence the buying decision, especially for higher-priced items like furniture that often require a significant financial commitment.