The public health nurse receives funding to initiate a primary prevention program in the community. Which program best fits the nurse's proposal?

Rationale: A. Vitamin supplements for high-risk pregnant women: Primary prevention aims to prevent disease before it occurs. Providing supplements like folic acid helps reduce the risk of neural tube defects and promotes maternal-fetal health. B. Lead screening for children in low-income housing: This is secondary prevention, as it involves early detection of a problem to allow for prompt intervention and reduce complications. C. Regional relocation center for earthquake victims: This is a tertiary prevention or disaster response measure, aimed at managing the aftermath of an event rather than preventing it. D. Case management and screening for clients with HIV: This is secondary and tertiary prevention focused on managing an existing condition and minimizing progression or complications.