Concept:Arguments are judged on whether they directly support a clear advantage or disadvantage of privatising public transport.Explanation:Argument I states that private operators are more efficient and can improve service quality. This is a valid reason in favour of privatisation. So, Argument I is strong.Argument II states that public transport is a basic service and must remain under government control to keep it affordable. This is also a valid concern against privatisation. So, Argument II is strong.Since both arguments present reasonable and relevant points from opposite sides, both are strong.Answer:C. If both Argument I and II are strong