Issues of public opinion are only concerned with what?
public attitudes about sports
personal preferences for music
social classes
public affairs

Issues of public opinion are only concerned with public affairs. Public affairs can be explained as the issues or problems which are a concern of a whole nation/society.

Public affairs mat refer as;

Public affairs (broadcast), radio or television programs that focus on matters of politics and public policy

Public Affairs (Military), US Department of Defense offices that deal with the media

Public affairs (political party), former Czech political party

Quarterly public affairs, American philosophy magazine

Public Affairs, an American publishing company