A 54-year-old man presents with new iron deficiency anaemia (Hb 96 g/L, low MCV, low ferritin) and no obvious gastrointestinal symptoms. According to Canadian recommendations, what is the most appropriate next step?AStart oral iron and observe; no further investigationBScreen for coeliac disease and colon cancer with bidirectional endoscopyCOrder abdominal ultrasound onlyDRefer directly for small bowel capsule endoscopyEAssume dietary deficiency and repeat blood work in 6 monthsCheck my answer