Answer: Option C
Explanation: In simple words, price discrimination refers to the condition in which a supplier or producer of a good or service charges different prices from different customers, although that particular commodity remains same in respect of utility satisfactions.
In the given case, golf course and airlines are charging different prices for different level of services, hence we cannot term it as a price discrimination.
However, in option C the apartment is charging different prices from differ customer based upon their race for same level of service.