One of the most prominent phonological characteristics of Black English is the frequent simplification of consonant clusters at the end of words when one of the two consonants is ______ /t/，/d/，/s/，or/z/.

One of the most prominent phonological characteristics of Black English is the frequent simplification of consonant clusters at the end of words when one of the two consonants is ______ /t/，/d/，/s/，or/z/.

A.a deletion

B.an increase

C.a decline

D.an alveolar

正确答案是D