Adam Andrews of the Quit Today Institute Wants to Know

Adam Andrews of the Quit Today Institute wants to know how many students at the local university smoke cigarettes.Adam obtains a list of phone numbers for every student enrolled at the college from the Dean.He selects students from the 24 000 on the list by taking every fiftieth student,giving him a sample of 480 students. What sampling method is Adam Smith using?

A) Simple random
B) Systematic
C) Disproportionate
D) Cluster
E) Stratified