This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Which statement about the esophagus is TRUE? Select all that apply 
Select and explain. 
A. It is a cartilaginous tube, B. It extends from the nasal cavity to the stomach., C. It lies anterior to the trachea, D. It has upper and lower sphincters
D: It has upper and lower sphincters
Answer: D: It has upper and lower sphincters 
Explanation: D: Upper and lower esophageal sphincters, located at the upper and lower ends of the esophagus, respectively, regulate the movement of food into and out of the esophagus.
A: The esophagus is a muscular tube, lined with moist stratified squamous epithelium.
B: It extends from the pharynx to the stomach. It is about 25 centimeters (cm) long.
C: It lies anterior to the vertebrae and posterior to the trachea within the mediastinum.