The function of ______is mainly to change the grammatical functi

The function of ______is mainly to change the grammatical function of the stem rather than its meaning.
A、affixation
B、prefixation
C、suffixation
D、derivation
【正确答案】：C
【题目解析】：本题考查第四章词缀法中后缀概念。前缀（prefixation）更侧重改变词义，后缀（suffixation）更侧重改变词性。因此根据题干意思，以及前缀后缀概念的理解，就能选出C项。