Although the ownership structure can vary from one company to another, the most basic form of corporation offers is known as common stock
As a result of this, we can see that an ownership structure has to do with how a company chooses to operate and the most common form which is usually used is the common stock.
This is very common because the owner of the common stock has a lot of different benefits and it is easier to buy and sell.
Therefore, the correct answer is common stock
Read more about common stock here:
https://brainly.com/question/20063593