A Recent Public Opinion Poll Found That 47 Percent of Respondents

A recent public opinion poll found that 47 percent of respondents approve of the job the president is doing. Subsequent polls found approval ratings of 46 percent, 48 percent, and 49 percent. Based upon this we can say the questions in the poll are what kind of measurement of presidential job approval?

A) valid
B) reliable
C) fair
D) random