Which of the Following Can Be Considered an Example of a Performance

Which of the following can be considered an example of a performance indicator for effectiveness?

A) A reduction in the number and severity of injuries, resulting from a road safety program.
B) The number of patients treated in a health clinic.
C) A decline in caseloads for social workers.
D) The costs of a job training program for long-term unemployed, per person placed in permanent employment.