Final answer:
Sally should check the specific laws and regulations of her state or jurisdiction to determine whether she needs a license to receive a referral fee.
Step-by-step explanation:
In order to determine whether Sally needs a license to receive a referral fee for referring her friend to Agent B, we need to consider the regulations governing referral fees in the real estate industry.
In some states or jurisdictions, a real estate license may be required to receive a referral fee. This is because referring someone to a real estate agent involves a form of brokering, which usually requires a license.
Sally should check the specific laws and regulations of her state or jurisdiction to determine whether she needs a license to receive a referral fee.