Which of the following business ownership structures is the simplest and easiest to set up?

A A copotrio

An LLC

A partnership

The most common forms of business enterprises in use in the United States are the sole proprietorship, general partnership, limited liability company (LLC), and corporation. Each form has advantages and disadvantages in complexity, ease of setup, cost, liability protection, periodic reporting requirements, operating complexity, and taxation. Also, some business forms have subclasses, such as the C corporation, S corporation, and professional corporation. Choosing the right business form requires a delicate balancing of competing considerations. Learn how to select, plan, and organize the business form that is a perfect fit for you.

I believe the answer is: A sole proprietorship

In sole proprietorship, there is only one owner that control 100% of the capital in the business. This means that there would be less legal necessities that usually exist when there are more people involved in the business. One disadvantage of this structure is that it's hard to obtain larger amount of capital.