Question. James went into his office at city hall. What type of building is this?
Options:
- skyscraper
- public building
- tall building
- work
- a house
Answer. public building
What step-by-step reasoning justifies that answer?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Reasoning: City halla re government buildings hence public building.