The demand made by the workers is that their salaries to cover t

The demand made by the workers is that their salaries to cover the increased cost of living.
A、increased
B、be increased
C、be increasing
D、were increased
【正确答案】：B
【题目解析】：本题考察虚拟语气，demand是表达虚拟语气的词语，后面用should do，should可以省略，而工资是被涨的，B项符合题意。