Which of the following is FALSE?() A: Incidental solitary pulmonary nodules (SPNs) less than 4mm in size are rarely malignant. B: Squamous cell carcinomas are mostly likely to cavitate C: High resolution CT is the main option for the evaluation of SPNs D: PET has a very high specificity but a lower sensitivity for malignancy E: The presence of fat density in the well-circumscribed nodule suggests benignity