A 45-year-old woman presents with fatigue and microcytic anaemia (Hb 90 g/L, MCV 70 fL). Ferritin is 5 µg/L. She reports heavy menstrual bleeding but no gastrointestinal symptoms. What is the most appropriate initial management?AStart oral iron therapy and investigate the cause of menorrhagiaBBegin blood transfusions to normalise haemoglobinCStart erythropoietin injectionsDNo treatment; monitor as this is likely physiologicalERefer immediately for bone marrow biopsyCheck my answer