The multiple listing services board members decided that the population of each area of the city would be best served by the brokerage who have offices, actually located within those areas, the board established boundaries dividing the city into six districts, and voted to limit listings for each district to only those brokerages with offices within the district brokerages, who tried to advertise beyond their own district, would be prohibited from listing properties in the MLS this action violate what real estate law

A$-$ Civil Rights Act

B$-$ Diversity Jurisdiction

C$-$ Sherman Anti$-$trust Act

D$-$ Housing and Community Development Act of $1974$