Indicate the type of sampling method that was used.

A)_A radio station asks its listeners to call in their opinion regarding the use of U.S. forces in peacekeeping missions.

B)_A college official divides the student population into five classes: freshman, sophomore, junior, senior, and graduate student. The official takes a random sample from each class and asks the members opinions regarding student services.

C)_The presider of a guest-lecture series at a university stands outside the auditorium before a lecture begins and hands every fifth person who arrives, beginning with the third, a speaker evaluation survey to be completed and returned at the end of the program.

D)_24 Hour Fitness wants to administer a satisfaction survey to its current members. Using its membership roster, the club randomly selects 40 club members and asks them about their level of satisfaction with the club.

E)_An internet service provider randomly selects 15 residential blocks from a large city. It then surveys every household from these 15 blocks to determine the number that would use a high-speed internet service if it were made available.

F)_Professor Jon is interested in knowing who will win the Major League Baseball World Series this year. He goes to the athletic department and asks every player on the Mercy College baseball team their opinion on who will in the World Series.