A national business magazine intends to survey its subscribers to determine who they think is the "CEO of the Century." Subscribers are invited to complete an online survey. Based only on this information, which of the following can be inferred about the survey results?
They will be biased because the magazine's subscribers are unqualified to determine who the CEO of the century is.
They will accurately reflect the opinion of the nation as a whole about who the CEO of the century is.
They will be unbiased because the respondents will be self-selected.
They will be biased because subscribers who have access to the online survey are not representative of the population of subscribers as a whole.