Among the following words,____ does NOT have inflectional affixe

Among the following words,____ does NOT have inflectional affixes.
A、liked
B、children's
C、happier
D、it's
【正确答案】：D
【题目解析】：Inflectional affixes 是屈折词缀。屈折词缀的特点就是改变词性。It’s是it is的缩写形式。