Propaganda slogan of Chinese character dictation contest

Analysis of test questions: Chinese characters are the carrier of Chinese culture, and developing Chinese writing activities is conducive to protecting the carrier of Chinese culture and consolidating the cultural foundation of the Chinese nation, so the topic ① is correct; Problem limb 2 does not match the meaning of the problem, so it is excluded; Topic 3 is not the meaning of developing Chinese writing activities, so it is excluded; Chinese characters play an important role in the inheritance of Chinese culture, so the topic is correct; The answer is a.