For the Following Statements and Arguments, Choose Which One of the Following

Multiple Choice

For the following statements and arguments, choose which one of the following statements best describe the evidence:
-A Gallup poll of 1800 randomly selected Americans predicted that if Oprah Winfrey became a candidate, she would win the presidential election by a significant number of percentage points. (from a city newspaper)
Conclusion: If Oprah Winfrey became a candidate, she would win the presidential election by a significant number of percentage points.

A) The sample is not sufficient in size or is not given.
B) The sample is not random.
C) The sample is not representative (or is lacking in breadth) .
D) The sample is sufficient, random, and representative.