单选题 According to ______ across the relevant research community, the published attack represents an extreme position in its demands for proof.
A. soundings B. echoes C. sonar systems D. reflections

【正确答案】 B

【答案解析】[解析] 四个选项的意思分别是：soundings声响，意见调查；echoes回声，反响；sonar systems声呐系统；reflections反射，见解。根据句子意思推出正确答案是A选项。例如， “Echo found her inspiration from the vast Sahara desert．”(三毛从茫茫的撒哈拉沙漠中得到了灵感。)