A 34-year-old woman presents with fatigue and microcytic anaemia (Hb 100 g/L, MCV 74 fL). Ferritin is 6 µg/L. She has heavy menstrual bleeding but no gastrointestinal symptoms. What is the most appropriate initial approach?AStart oral iron therapy and address menstrual bleedingBArrange urgent colonoscopy and gastroscopy in all casesCNo treatment is needed for ferritin of 6 µg/LDStart long-term transfusion programEStart high-dose folic acid onlyCheck my answer