Suppose the University Wants to Find Out from the Whole

Essay

Suppose the university wants to find out from the whole student body whether they support adding a swimming pool to the recreation center. Name the type of sampling for each item and discuss each in terms of bias (say more than "biased" or "not biased").
A) A notice in the student newspaper invites all students to email their opinions.
B) Telephone at random 20 groups of five names in an alphabetical list of the student body.