____ permite a los miembros de Prime ubicados en Estados Unidos comprar directamente en las tiendas en línea de los vendedores con entrega rápida y gratis, una experiencia para finalizar la compra fluida y devoluciones gratis en los pedidos elegibles.

Compra con Prime" (Buy with Prime) is the correct answer because it is the specific program that extends the benefits of Amazon Prime—fast, free shipping, a seamless checkout experience, and free returns on eligible orders—to customers shopping directly on a seller's own online store. This program is designed to leverage the trust and convenience of the Prime experience for purchases made off Amazon.com. Amazon.com is the primary marketplace, not a program that extends Prime benefits to external seller sites. Amazon Business is a separate service tailored for business purchasing, offering different features like bulk pricing and tax-exempt purchases, and does not relate to extending Prime benefits to third-party seller websites.