Explanation:

Let’s break it down:

- Debenture holders loan money to the company—they get paid interest, but they don’t own any part of it.

- Debtors are people or businesses who owe money to the company, not folks who own it.

- Shareholders are the actual owners of a company. When you hold shares, you own a bit of the company (which may mean voting rights and a share of the profits).

- “None of the above” doesn’t fit because shareholders is the right answer.