Why Does Organizational Commitment Tends to Increase Over Time

Why does organizational commitment tends to increase over time?

A) because individuals dislike change and therefore tend to stay with the same organization regardless of its shortcomings
B) because the workload tends to decrease and become easier the longer one is with an organization
C) because the "fear of the unknown" keeps employees from seeking other job opportunities
D) because individuals develop deeper ties to the organization and their coworkers as they spend more time with them