Answer:
e. Stimulation
Step-by-step explanation:
Carla has been actively performing well in her job, where she did not know the exact performance to be made. She even excelled at problem solving. This is basically an unexpected performance where she performs well. Thus, she shall be encouraged where there is stimulation. as in stimulation there is basically the task of problem solving through various techniques.
And that the problems are different in nature every time, and not known.