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:
-Four out of five doctors recommend Painfree for headaches. (ad)
Conclusion: Four out of five doctors recommend Painfree for headaches.

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.