A political party sends a mail survey to 1500 randomly selected registered voters in a community. The survey asks respondents to give an opinion about the job performance of the current President. Of the 1500 surveys sent out, 480 are returned, and of these, only 120 say they're satisfied with the President's job performance. This is an example of a survey with:

Alittle bias because an individual will know for certain whether they approve of the President's job performance.

Blittle bias because 1500 voters represent an important part of his district.

Cno bias.

DNone of the answer choices is correct.