According to Section 10159.5(a) of the Business and Professions (B&P) Code, what does the Real Estate Law mandate regarding fictitious business names?
a) Fictitious business names must be registered with the state government.
b) Fictitious business names must be approved by the National Association of Realtors.
c) Fictitious business names must appear on the broker or corporation license before use in real estate activities.
d) Fictitious business names must be disclosed to clients but do not require any formal registration.