The following attributes are commonly used to describe surveillance systems. Which of the attributes are critical for a surveillance system designed to detect and control infectious disease outbreaks and characterize populations at greatest risk for those diseases?
The following attributes are commonly used to describe surveillance systems. Which of the attributes are critical for a surveillance system designed to detect and control infectious disease outbreaks and characterize populations at greatest risk for those diseases?

A. Simplicity

B. Flexibility

C. Data quality

D. Acceptability

E. Sensitivity

F. Predictive value positive

G. Representativeness

H. Timeliness

I. Stability