A 59-year-old smoker presents to his GP. He has no respiratory symptoms. According to the RACGP Red Book, which of the following lung cancer screening strategies is recommended for asymptomatic high-risk individuals in Australia?AAnnual chest X-rayBAnnual sputum cytologyCLow-dose CT scan every year for all current or former smokersDNo population-based screening; investigate only if symptomatic or in research settingsERoutine CT scan every 5 yearsCheck my answer