A、From March 25 to March 30. B、January 1. C、From March 25 to April 1. D、April 1. C

April Fools’ Day is a day to play jokes on others. No one knows how this holiday began, but people think it first started in France. In the 16th century, French people celebrated New Year’s Day from March 25 to April 1. In the mid-1560s King Charles IX changed it from March 25 to January 1. But some people still celebrated it on April 1, so others called them April Fools. Each country celebrates April Fools’ Day differently. In France, people call the April Fools "April Fish". They tape a paper fish to their friends’ backs to fool them. When he or she finds out, they shout "April Fish!"
  In England, people play jokes only in the morning. You are a "noodle" if someone fools you. In Scotland, April Fools’ Day is 48 hours long. They call an April Fool "April Gowk". Gowk is another name for a cuckoo bird.
  In America, people play small jokes on their friends and many other people on the first of April. They may point down to your shoe and say, "Your shoelace is untied." If you believe them and look down to see, you are an April Fool then.