Concerning the ribs, the right description is

A.the ribs are eleven in number on each side

B.1st~8th Ribs are called true ribs

C.8th~11th Ribs are called false ribs

D.the anterior end is called costal angle

E.the posterior end of rib enlarged to form the costal head

正确答案：the posterior end of rib enlarged to form the costal head