Answer:
C . attitudes about political issues , leaders, institutions and events.
Explanation:
Public opinion as the name implies is what the society or public perceive about a party, an issue or politics generally. To weigh what people actually think on certain issues are usually hard but then, there are certain examples of public opinion that matters.
People tends to have different opinions on certain issues like politics, state of the nation etc. Examples of public opinion are participating in polls, meetings, protest , survey etc.