What is authorized capital offered to the public called? What is a market structure with one buyer and many sellers? Calculate ATC given TC at 20kg from figure 1.

The part of a company's authorized capital that is offered to the public for subscription is known as issued capital.
The correct option is C.
$\boxed{\text{C. issued capital}}$

A market structure with only one buyer and many sellers is called a monopsony.
The correct option is B.
$\boxed{\text{B. monopsony}}$