Answer:
The correct answers are:
Lachelle selling 100 shares of stock
A farmer selling 100 bushels of corn
A local dairy farmer selling milk
Step-by-step explanation:
To begin with, a perfect competition market is the one whose characteristics are the following: to have an homogeneous product; to have a lot of consumers and sellers as well so that they both are price takers given the forces of the market; to have transparent and clean information available for every consumer; there are not legal barriers at the entry or either at the exit for the companies.
Secondly, those situation are given in a perfect competitive market because they all have those characteristics. They are markets with homogeneous products and a lot of sellers and consumers as well.