The nurse implements a primary prevention program for sexually transmitted diseases in a nurse managed health center. Which outcome indicates that the program was effective?

A. Clients who incurred disease complications promptly received rehabilitation: This outcome suggests that the focus is on secondary prevention rather than primary prevention. B. More than half of at-risk clients were diagnosed early in their disease process: While early diagnosis is important, it is not a direct measure of the effectiveness of a primary prevention program. C. Average client scores improved on specific risk factor knowledge tests: This outcome indicates that clients are better informed about risk factors for sexually transmitted diseases, suggesting that the primary prevention program has been effective in increasing awareness and knowledge. D. New screening protocols were developed, validated, and implemented: While developing new screening protocols may be beneficial, it does not directly measure the effectiveness of the primary prevention program.