Which of the following is the best response to a telephone call from your dad's coworker who just asked if you are home alone? a. yes, not that it's any of your business. b. i don't feel that's an appropriate question, but i will contact my father and make sure he knows that you called. c. no, my brother is here, too. d. yes, but my mom just went to the grocery store so i expect her back any moment.