Concept:Privatization transfers ownership from the government to private firms, whose main aim is earning profit rather than serving public welfare.
Explanation:In privatization, private companies focus on maximizing their own financial gains.
This profit motive can outweigh the need to protect public interest.
To increase profits, such firms may raise prices, reduce service quality, or ignore social responsibilities.
Therefore, the key disadvantage is that public welfare becomes secondary to private profit.
The other options are not the central disadvantage because inefficiency and lower quality are usually effects, not the main reason.
Answer:C. the profit motive outweighs public interest.