Concept:Efficiency of labour measures how much output workers produce per unit of time, without lowering quality. It depends on quality-related factors, not on the mere number of people available.
Explanation:Education and training improve workers’ skills, so they raise efficiency.
Social attitude to work, such as discipline and motivation, influences how hard people work.
Working conditions, including safety and equipment, also affect productivity.
Total population only refers to the number of people in a country, not their productivity level.
A larger population does not automatically make workers more efficient.
Therefore, total population is not a determinant of labour efficiency.
Answer:C. Total population