What type of business arrangement do A, B, and C most likely have when they pool their income for investment?

When A, B, and C pool their income for investment purposes, they are most likely engaging in a general partnership. In a general partnership, two or more individuals come together to conduct business and share profits and losses. Each partner is equally responsible for managing the business and has unlimited liability for the debts incurred by the partnership.

This structure contrasts with a limited partnership, where at least one partner has limited liability and is not involved in day-to-day management. A joint venture involves a temporary partnership for a specific project or purpose, while sole proprietorship refers to a business owned and operated by one individual, who is solely responsible for all aspects of the business. Given that A, B, and C are pooling their resources, a general partnership is the most fitting arrangement as it encapsulates their collaborative effort under shared management and liability.