Employees in a local government garbage collection unit believed that promotions were given only to those who belonged to the after-hours bowling team. This is an example of which of the following sources of conflict?

A) personal differences
B) information deficiencies
C) role incompatibility
D) environmental stress

The conflict here arises from employees' belief that promotions are given based on membership in the after-hours bowling team, rather than on merit or other criteria, suggesting a lack of information about the actual promotion process. This is an example of an information deficiency as a source of conflict. Personal differences refer to interpersonal or value-based conflicts, role incompatibility refers to conflicts arising from discrepancies in job expectations, and environmental stress refers to conflicts related to external factors, such as financial or political pressures.