91. 關於肺癌篩檢,根據NCCN guidelines in lung cancer screening-v1.2014,篩檢民眾知風險評估(Risk assessment)下列哪一項不屬於高風險群(第一級證據, category 1 evidence and consensus)之要件
(A) Age 55-74y
(B) ≧30 pack year history of smoking
(C) Smoking cessation < 15y
(D) Family history of lung cancer