Final answer:
All options listed are types of public opinion: majority opinion, elite opinion, and issue public. Hence, the correct answer is 'All of the above'.
Step-by-step explanation:
The types of public opinion include a variety of different perspectives that the public might hold regarding political, social, or economic issues. Among these are majority opinion, which is the view held by the greatest number of people; elite opinion, which refers to the perspectives of those with significant social, economic, or political influence; and issue publics, which represents the part of the public that is intensely concerned with a specific issue. The correct answer to the question, 'Which of these is a type of public opinion?' is therefore d. All of the above.