单选题 You need to rewrite this sentence because it is ______ . The readers will have difficulty in understanding it.
A. comprehensive B. alternative C. deliberate D. ambiguous

【正确答案】 D
【答案解析】ambiguous含糊的，不明确的。comprehensive全面的，广泛的。alternative两者择一的，另类的。deliberate深思熟虑的；蓄意的。