Recently, you promoted your star programmer, Janak Kumar, to lead the development team. Janak was a fantastic software coder, and you thought the promotion would mean that he could now share his expertise with the other development team members. However, you are surprised to learn that the performance of Janak in his new role is not meeting your expectations. Which empirical rule did you forget while considering the promotion of Janak?

Expectancy theory

Peter principle

Pareto concept

Murphy's law