Bizneznuz.com, an online business news agency, conducts a poll.

bizneznuz.com, an online business news agency, conducts a poll. Visitors to the site are invited to click on one of two buttons in order to register that they “agree” or “disagree” with the following statement: “Funding for space exploration should be left entirely to the private sector.” 

If bizneznuz.com wants to accurately measure its online readership’s support for government-funded space exploration, this poll will deliver a biased and unrepresentative response because: