Drew tries to predict which restaurant will have at least amount of business during Christmas season. There are three restaurant in the city. Two are on the outskirts of the city and one is in the city. He learned that two hotels situated on the outskirts are fully booked because one has a huge indoor pool. From this information he inferred that the restaurant in the city will have the least amount of business during the Christmas season. What would have been an improvement in Drew's experiment?
A. ask people at the restaurant if they like fast food.
B. survey all people to see which December holiday they celebrate.
C. look at the past holiday performance of the restaurant.