The young man is likely talking about the profession of a lawyer. Here's the reasoning for the matching:

1. **How necessary the job is?** - **A** matches here: "It has always been an important job because it helps societies to maintain order." This highlights the essential role lawyers play in the justice system.

2. **What benefits does the job bring to you?** - **C** fits: "What I also like about this job is the flexible schedule. If I work for a law company, I may be allowed to work from home." This indicates the flexibility often associated with legal careers.

3. **How will you prepare for the job?** - **B** corresponds: "The job requires a lot of hard work... and I will have to study very hard to pass a difficult test called a bar exam." This clearly relates to the rigorous education and testing required to become a lawyer.

So, the matched responses are:

- 1: A
- 2: C
- 3: B