An Individual Purely Competitive Seller Can Sell

An individual purely competitive seller can sell:

A) as much or as little of its product as it wishes at the going market price.
B) its product at more than the going market price, but it will not sell as much as it could at that price.
C) more of its product than it could sell at the going market price if it drops its price below that price.
D) all of the above.