Concept:Commercialization means restructuring a government-owned unit to run like a profit-making business.
Explanation:A public corporation is established and owned by the government.
Initially, it focuses on providing public services rather than earning profits.
When commercialized, it is reorganized to operate on commercial principles and generate revenue.
In contrast, cooperative societies, private companies, and sole proprietorships are already privately or member-owned.
They are not typical subjects of commercialization by the government.
Answer:A. public corporation