Organizational behavior scholars have concluded that:

A) as job performance increases, job satisfaction decreases.
B) job performance is the best predictor of job satisfaction.
C) job satisfaction is unrelated to job performance.
D) people with higher job satisfaction tend to have higher job performance.
E) both 'A' and 'B' are true.

Organizational behavior scholars have concluded that job satisfaction and job performance are related. Studies have shown that people who are more satisfied with their job tend to perform better. This could be because they are more engaged and motivated, or because they have better relationships with coworkers and managers, among other factors. Therefore, choice D is the best answer. Choice A is incorrect because research shows that job satisfaction and job performance are positively related. Choice B is partly true, as job performance is a predictor of job satisfaction, but not necessarily the best predictor. Choice C is incorrect, as there is evidence that job satisfaction is related to job performance. Finally, choice E is partly true, as both A and B are not completely accurate.