The interviewer wants to know that you are well aware of the services offered at Mathematica Policy Research, Inc.. Have you used them previously? Discuss with the interviewer any exposure you have had to the company. Keep your response positive and lighthearted.
"I have not personally used your commercial services; however, I have friends who have used Mathematica Policy Research, Inc. for their business needs and their reviews were always positive!"
"I have been a customer of Mathematica Policy Research, Inc. before, yes! The services I used were A, B, and C. My experience here was very comfortable, and everyone was professional. This experience is one of the reasons why I applied for this role. I want to work for a company that has high standards, and I know first hand that you do!"