Which Statement About the Development of Job Satisfaction Is True

Which statement about the development of job satisfaction is true? ​

A) Blue-collar workers' level of job satisfaction rises quicker than that of white-collar workers.
B) Job satisfaction decreases when responsibility is increased.
C) Job satisfaction tends to increase gradually with age.
D) When older workers begin to make work less of a focus in their lives, it takes more to keep them satisfied with work.