C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.
Answer:
This quarantine period is very special. This is the longest Lunar New Year holidays for children ( 3 months ) in my country. So many announcements about the number of deaths and new cases were made everyday, and even little kids were interested in them. This period have taught us a lot, especially "teamwork" skills - together, We Will Win the Virus, even when many of people have lost their work...
Explanation:
