【正确答案】 B

【答案解析】[理由] 本句测试下列固定短语：
be held responsible for… 被认定要为……负起责任
hold sb responsible for... 认定某人要为……负起责任
[例] No one should be held responsible for the accident.
(任何人都不应为这起意外负责。)
My boss held me responsible for the failure of the project.
(我的老板要我为该专案的失败负责。)
根据上述，(B)应为正选。