Mr. Patel is a 64-year-old man who was told by another care provider that his liver is enlarged. Although he is a life-long smoker, he has never used drugs or alcohol and has no knowledge of liver disease. Indeed, on examination, a liver edge is palpable 4 centimeters below the costal arch. Which of the following would you do next?A) Check an ultrasound of the liverB) Obtain a hepatitis panelC) Determine liver span by percussionD) Adopt a "watchful waiting" approach