All of the following are examples of the difficulties associated with measuring public opinion EXCEPT
Athe intensity of the opinions expressed.
Bthe stability or changeability of an expressed opinion.
Cstimulating discussion about them.
Ddetermining the relevance of an expressed opinion.
Athe intensity of the opinions expressed.
Bthe stability or changeability of an expressed opinion.
Cstimulating discussion about them.
Ddetermining the relevance of an expressed opinion.