Which statement describes corporations in terms of attributes?

The statement that none of the provided options accurately describes corporations reflects the understanding of the legal nature and characteristics of corporations.

Corporations are legal entities, meaning they possess legal powers to enter into contracts, own property, and conduct business activities independently. This characteristic directly contradicts the first option, which states that corporations have no legal powers.

When discussing autonomy, corporations are recognized as separate legal persons from their owners (shareholders), allowing them to function independently in legal transactions. As such, referring to corporations as autonomous associations misrepresents their structural and legal complexity. Corporations do encompass a broader range of participants than simply natural persons; they can also include other corporations as members or shareholders, which challenges the assertion that they may only be formed by natural persons.

Thus, the conclusion that the correct choice is "none of the above" is rooted in an accurate interpretation of the fundamental attributes of corporations as established in corporate law. This means all provided statements do not reflect the true nature of corporations.