Specific inquiry should be written _______ clearness and complet

Specific inquiry should be written _______ clearness and completeness and if important, it should be written _______ details.
A、with,in
B、in,with
C、with, with
D、in,in
【正确答案】：A
【题目解析】：in details 详细地；
句意：具体的询问应该写得清楚和完整，如果重要的话，应该写得详细。