Estimates of from 2 percent to 20 percent of a taxicab company’s driver workforce could result as new federal regulations requiring that all drivers be fingerprinted and the drivers checked to see if they have a criminal record. this new will cause a worsening problem for the already over-extended employer.

The correct answer is background check

That's when you check the people you want for whether or not they've been criminals in the past. This is very common for people who want to become police officers, who want to get a job, buy a gun, join the army, or anything similar that might require you to not be a criminal.

Icould be wrong but i would say b.