Which dashboard should you use to gauge the overall efficiency of a user for a specific process? 

Answer options:

A. workload per process on a standard dashboard
B. workload per participant on a standard dashboard
C. performance per participant on a standard dashboard
D. a custom dashboard

B

Reference: http://docs.oracle.com/cd/E28280_01/user.1111/e15175/bpmug_ws_dshbds.htm