The most important ethical responsibility of a journalist, according to the code of ethics for professional journalists, is C. reporting the truth.
Journalists have a responsibility to report news and information accurately, fairly, and without bias. This means that they must gather and verify information from multiple sources, and present it in a way that is clear and easy to understand. Additionally, they must avoid conflicts of interest and disclose any potential biases that may affect their reporting. The ultimate goal is to provide the public with accurate, reliable information that they can use to form their own opinions and make informed decisions.