According to Herzberg's motivator - hygiene model,which of the following would be considered a motivator?

A) friendly co-workers
B) clean room
C) advancement
D) good boss

According to Herzberg's motivator-hygiene model, advancement is considered a motivator factor. Motivator factors are those which are intrinsic to the job itself and include factors like growth opportunities, challenging work, and recognition. Advancement is a desired outcome for employees, as they feel a sense of accomplishment and growth through career progression. Friendly co-workers and good boss are also factors that can contribute to job satisfaction, but they are hygiene factors, as they are extrinsic to the job itself. Clean room is also a hygiene factor as it is related to physical working conditions.