The owner of a roadside restaurant prefers not to serve black or Hispanic customers. She paid for the property, she feels, and has spent many years developing the business; therefore, she should have

The owner of a roadside restaurant prefers not to serve black or Hispanic customers. She paid for the property, she feels, and has spent many years developing the business; therefore, she should have the right to decide whom she serves. Is her whites-only preference ethically defensible?