I think they should have offered Tom the job

I think they should have offered Tom the job.
a. I think Tom should have been offered the job by them.
b. I think Tom should have been offered the job.
c. I am thought they should have offered Tom the job.
d. I think the job should have been offered Tom
CHọn cái nào zậy chọn đúng mik cho 5* and tick điểm tối đa