The correct answer is B.
A mechanic is the most likely person to learn job-related skills in an educational apprenticeship. He would probably do a short school training where he would obtain basic knowledge about his job. Most of his training would nevertheless be done in a garage under supervision of his master. He would do an apprenticeship which means learning the job hands-on.
In order to become a lawyer, a nurse or a high school teacher, a collage degree is needed.