Managers can empower employees and help them develop self-efficacy by:

A) avoiding challenging jobs.
B) providing harsh criticisms.
C) rewarding employees' achievements.
D) minimizing their role in decision making.

Empowering employees and helping them develop self-efficacy involves providing support and recognition for their achievements. Rewarding employees' achievements (C) is a direct way to boost their confidence and sense of empowerment, as it acknowledges their efforts and contributions, thereby enhancing their belief in their own abilities.