What type of partnership involves collaboration between startups and corporations that can accelerate sales?

The correct choice is Corporate Partnership, as it specifically denotes a collaborative relationship between startups and established corporations designed to leverage each other’s strengths for mutual benefit. In such partnerships, startups can gain access to the corporation's extensive resources, distribution networks, and established customer bases, while corporations can innovate and enhance their product offerings by incorporating the agility and fresh ideas typically found in startups. This symbiotic relationship can significantly accelerate sales for both parties, enabling startups to reach a wider market more quickly than they could on their own.

In contrast, a Joint Venture typically involves creating a new entity that both parties own, which might not be the most efficient mechanism for accelerating sales. A Franchise Agreement is focused on allowing one party to operate a business under the branding of another, providing a different model for growth that does not inherently facilitate collaboration in sales acceleration. Lastly, a Supplier Agreement primarily focuses on the supply chain relationship and the exchange of goods, which does not emphasize the strategic collaboration that characterizes Corporate Partnerships.