Answer:
Option (3).
Step-by-step explanation:
Active surveillance may be defined as the group of management requires for the patients that are at low risk of disease. The information on the disease occurrence was collected by active surveillance.
This involves the staff members that can contact with the physicians to collect the report about the patients. The disease is a particular population can be collected by active surveillance. They reduce the burden of the health care and this is inexpensive.
Thus, the correct answer is option (3).