Answer:
D. Selecting candidates for political parties
Step-by-step explanation:
Media plays a very important role in democracy. Media is a independent body that can freely investigate about the government and their political issues.
Media allows political parties to reach large population and can inform and make them aware of election and policies. It helps people to select candidates for political parties after listening each political parties policies and issues.
Hence, the correct answer is "D. Selecting candidates for political parties".