The isthmus of fauces is bounded by which of the following struc

The isthmus of fauces is bounded by which of the following structures?

A.uvula（腭垂）

B.free border of the velum palatinum (腭帆)

C.palatoglossal arches （腭舌弓）

D.palatopharyngeal arches （腭咽弓）

E.root of the tongue

正确答案是ABCE