The father,rather than the brothers, _______ responsible for the

The father,rather than the brothers, _______ responsible for the accident.
A、is
B、are
C、have been
D、has
【正确答案】:A
【题目解析】:rather than the brothers 是插入语,不影响主句,因此be动词要与主语the father 保持一致,选A