Based on the Error in Sampling in Political Polls That

Based on the error in sampling in political polls that was described in your text, how would you recommend obtaining a representative sample for a poll (survey) about political candidates?

A) Conduct phone surveys using home phone numbers.
B) Poll people at the local office, which provides Food Stamps and other forms of assistance.
C) Give the poll face-to-face at college campuses nationwide.
D) Give the poll face-to-face at an average supermarket or post office.