A sporting goods store wants to know what products their customers most want. There were four different suggestions about how to survey the customers.

Which method of sampling customers is least biased?

A Survey every other adult who brings children along to shop.

B Survey only customers who enter the store's shoe section.

C Survey every person who enters the sporting goods store between 10:00 and 11:30 AM.

D Survey every 10th person or group who enters the sporting goods store throughout the entire day.