Which of the following is NOT one of the stylistic features of i

Which of the following is NOT one of the stylistic features of idioms? （ ）
A、Frozen style.
B、Slang.
C、Literary style.
D、Colloquialisms.
【正确答案】：A
【题目解析】：习语的文体色彩包括：口语词 (Coloquialisms)、俚语 (Slang)和书面表达式 (Literary expressions)。