-----------------------is used to determine people’s preference for a specific government policy options.

The term you are looking for is "Public Opinion Poll."

Public opinion polls are surveys conducted to gauge the preferences, attitudes, evaluations, and opinions of a group of people regarding specific issues, including government policy options. These polls can provide valuable insights for policymakers and political leaders, helping them understand the public’s perspective and make informed decisions that reflect the citizens' preferences. Polling usually involves sample populations, which can be representative of larger demographics, and employs various methods such as questionnaires or interviews. The results of these polls are often used to influence campaign strategies, policy formulations, and to assess the electoral climate.