The teacher, with 6 girls and 8 boys of her class, ________, vis

The teacher, with 6 girls and 8 boys of her class, ________, visiting a museum when the earthquake struck.
A、was
B、were
C、had been
D、would be
【正确答案】：A
【题目解析】：考查主谓一致的情况，with短语对主谓一致没有影响。