Concept:Public opinion has certain recognised features or dimensions that describe its nature, while polling is only a method used to measure it.
Explanation:The main dimensions of public opinion are direction, stability, intensity, and salience.
Direction refers to the position people take on an issue, whether they are for or against it.
Intensity measures the strength or force with which people hold their opinion.
Stability shows how consistent and durable an opinion is over a period of time.
Salience indicates how important the issue is to the members of the public.
Orientation, as used in public opinion, is close to direction because it describes how people lean towards an issue.
Substance, in some discussions, describes the actual content or focus of the opinion.
Polling, however, is not a dimension of public opinion.
Polling is a technique or instrument used by researchers to collect and measure the opinions of people through surveys and questionnaires.
It is therefore a tool for assessing public opinion, not an inherent feature of the opinion itself.
Since intensity, substance, and orientation can all relate to the character of opinion, polling is clearly the odd one.
Answer:C. polling