单选题 The police went out of their way to investigate the explosion case, but there were no indications that standard security arrangements were______.
A. at hand B. in fault C. in question D. in effect

【正确答案】 B

【答案解析】[解析] A项at hand“在附近”；B项in fault“有过错”；C项in question“正被讨论”；D项in effect“有效”。句意：警察在调查这起爆炸案时费了很大力气，但并没有迹象表明日常安全部署出了问题。B项最符合题意。