Please briefly describe why should I choose that answer.Thank you very much!!

Which of the following would be an example of an enforceable covenant? A. A homeowner in subdivision A promises to let people from subdivision A walk through her lot to access a public park located in subdivision A B. A homeownder in subdivision A promises to let pe0ple from subdivision B walk through her lot to access a public park located in subdivision A. C.People in subdivision A agree to never let people of certain ethnicities buy homes in the subdivision D. Pe0ple in subdivison A agree that all homes will be painted neutral shades of beige The Federal Trade Commission (FTC) has claimed that Scott's company, which creates exams for students, is misrepresenting the difficulty of the exams when making his sales pitches to college professors. Scott wants to bring his issue with the FTC to court. What must he do? A. He must first go through all FTC challenge processes before bringing his issue to court because of the delegation doctrine. B. He can bring his issue to court immediately under the right-to-sue doctrine. C. He can bring his issue to court immediately under the expansive challenges doctrine. D. He must first go through all FTC challenge processes before bringing his issue to court because of the exhaustion doctrine