This topic examines current events. April 15, 2022 is the seventh National Safety Education Day. Publicity activities have been carried out to popularize the law on National Safety Education Day in 2022. The theme of this year's event is "strengthening the overall concept of national security, realizing the achievements of national security in the new era, and creating a good atmosphere for welcoming the party's twentieth victory". Therefore, the correct answer to this question is item B.