What Does an Outdoor Advertiser Buy When It Buys a 100

What does an outdoor advertiser buy when it buys a 100 showing?

A) It buys 100 panels for a specified period of time.
B) It pays 100 percent of the rate card price for as many panels as it chooses to utilize.
C) It has been guaranteed that 100 percent of the population will be exposed to its outdoor advertising daily.
D) It buys 100 percent of the billboards owned by that particular outdoor advertising company within the specified area.
E) It has its message displayed on as many panels as needed to provide a daily exposure equal to 100 percent of the market's population.