Morphemes which represent such grammatical categories as number,

Morphemes which represent such grammatical categories as number, tense, gender, and case are called _______ morphemes.
A、free
B、bound
C、derivational
D、inflectional
【正确答案】：D
【题目解析】：语素代表诸如数、时、性、格等语法范畴称为屈折语素。