Answer:
external
Step-by-step explanation:
Locus of control is the extent of how much someone believes they have control of the event in their lives. External locus of control means that the person believes most of the event is outside of their control. Sam believes that promotion is random and he has no control over it.
Internal locus of control means that the person believes that they have control than others. If Sam has an internal locus of control, he will believe that his action can make him get promoted.