Which population-level intervention would most directly reduce iron deficiency risk among adolescent girls in a low-resource school setting?

Encourage high-intensity sports for all female students to increase appetite and thereby raise iron intake passively without targeted supplementation or screening.

Provide weekly iron supplementation or iron-folic acid tablets alongside nutrition education and screening for heavy menstrual bleeding, because supplementation directly addresses increased menstrual iron loss and limited dietary iron access.

Focus only on increasing vitamin C intake school-wide since vitamin C alone can compensate for low iron stores without addressing iron intake or losses.

Eliminate all animal-source foods from school meals to prevent iron overload and thereby paradoxically improve iron status.