FreezeFrame, a social networking site, sent out a survey in which the users simply click a response to join the sample. One of the questions in 2015 was, "Do you prefer to shop online?" More than 45,000 people responded, with 79% responding yes. What can you conclude from the survey?

a. About 79% of people planned to shop online in 2015.

b.The poll used a convenience sample, so the results tell us little about the population of all adults.

c. The poll used voluntary response, so the results tell us little about the population of all adults.

d. The sample is too small to draw any conclusions.

e. None of the previous answers is correct.

Thank you for your help!