According to Research by Jacobs and Shapiro,why Do Politicians Use

According to research by Jacobs and Shapiro,why do politicians use public opinion polls?

A) to tell them how to vote on legislation
B) to determine what policies to pursue -Consider This: The common view of politicians pandering to the results of public opinion may be mistaken.
C) to identify centrist approaches to public policy
D) to shape their messages to the public