Answer:
a. important motivators.
Explanation:
Fredrick Herzberg was one of the most famous American psychologist. He is well known all over the world for the introduction of the job enrichment as well as the Motivator-Hygiene theory.
He states that some factors in the workplace causes job satisfaction while other factors leads to job dissatisfaction and they are independent of each other.
According to him, the feeling of achievement and recognition as well as the interest in their work are all factors of important motivators.