Which is true about public opinion polling?
a) Polls are always incorrect Sampling error decreases as sample size increases
b) Polling accuracy is not related to whether respondents are familiar with the issues in question
c) Polls are the least reliable way to measure opinon

c) Polls are the least reliable way to measure opinon

Explanation:

Opinion polls or poll is the term term used to sample the opinion or take survey of a small population from a large population.

The reason opinion polls are not always encouraged or the best form of data collection or research is because the polls are not always reliable.

Most times individual who don't have better knowledge about an issue end up giving an opinion about it.

It uses a subset to determine the opinion of a population.

These reason are why opinion polls are not reliable.