Twigs is an online polling website that allows users to easily create polls and vote on polls created by other users. A March 2010 poll asked, "Has concern about autism influenced your decision about whether to vaccinate your chil had selected, "No, I'm not worried about it." You can conclude: _________

a. The great majority of parents who visit Twiigs are not influenced by concerns about autism when vaccinating their child.
b. The great majority of parents are not influenced by concerns about autism when vaccinating their child.
c. Nothing further because the sample is too small
d. Nothing further because the sample is not random