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) Increases in job satisfaction are best predicted solely by a worker's age.
C) Job satisfaction may be cyclical regardless of 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.