A company wants to know if its employees prefer to start their workdays at 7:00 a.m. or 9:00 a.m. They conduct a survey and send it to 300 randomly selected employees who already chose to start work at 7:00 a.m. Why do the results of this survey not represent all employees ' preferences at the company ? (1 point ) The survey is done through email. The survey is not sent to all employees in the company The sample is biased toward those who already prefer to start work early The company should have sent the survey to 300 employees who already chose to start work at 9:00 instead