Final answer:
Typically, a real estate license is required to lease real estate on behalf of others, but there may be exemptions for federal entities and officials. An attorney specializing in federal law can handle the transaction without a separate real estate license. The correct options are a and c.
Step-by-step explanation:
If you are helping the local postmaster general lease a building that belongs to the post office but is no longer used as a post office, it depends on state laws and regulations whether a real estate license is required. Generally speaking, individuals or entities engaging in the leasing of real estate on behalf of others typically need to have a real estate license.
However, in some cases, federal entities, government officials, or their appointed agents might be exempt from such requirements when performing their official duties. Option (c), where an attorney specializing in federal law could handle the transaction, is a valid possibility since attorneys are usually authorized to engage in real estate transactions as part of their legal practice without the need for a separate real estate license.
Moreover, it's always a good idea to consult with a legal professional when dealing with real estate matters to ensure compliance with all applicable laws and regulations.
Hence, Options a and c are correct.