An example of using bribery to engage in union busting would be

There ways that union busting is made.  One of them is to threaten workers that their benefits would be revoked if they continue to strike against the company.  Another would be to employing outside forces that would break-up strikes and then there’s firing employees who insist on striking.  These are just some of the ways to employ union-busting.

Ithink the answer is b, monopoly