Which of the following are likely reasons why the percent who supported the law in this poll (19%) differed so much from the percent who supported it in the Field Poll (34%). (Select all that apply.)
a) Sampling Bias: The surveyed population in the current poll may not be representative of the general population.
b) Question Wording: The phrasing of the questions in the two polls might have influenced respondents' answers differently.
c) Timing: The polls were conducted at different times, and public opinion may have changed between the two surveys.
d) Sample Size: The number of participants in each poll may have been significantly different, affecting the reliability of the results.