The morpheme of plurality /-s/is pronounced as/s/in cats,/z/in bags, and /iz/in matches. This example shows（ ）.

The morpheme of plurality /-s/is pronounced as/s/in cats,/z/in bags, and /iz/in matches. This example shows（ ）.

A.morphemes are abstract units

B.allomorphs are phonetically conditioned and thus predictable

C.morphs are actual spoken, minimal carriers of meaning

D.monomorphemic words coincide with words and function freely in a sentence

正确答案是B