How long is a typical adult human oesophagus？

How long is a typical adult human oesophagus？
A.approx. 25 cm (10 inches)
B.approx. 30 cm (12 inches)
C.approx. 35 cm (14 inches)
D.approx. 40 cm (16 inches)
E.approx. 20 cm (8 inches)
正确答案：approx. 25 cm (10 inches)