(B) Individually controlled
In the private sector, ownership of assets and delivery of services is in the hands of private individuals or companies, guided by the motive to earn profits.
The key distinction: public sector = government ownership; private sector = private individuals/companies own assets and deliver services for profit. Options (C) and (D) describe public sector objectives, not private. Option (A) is the definition of the public sector. Examiners expect students to recall the ownership-based classification directly.