Test Analysis: This question examines the relevant knowledge of China's modernization exploration. From what we have learned, we know: ① Self-imposed wealth appeared in the 1960s of 19; (2) Reform appeared in the 1960s of 1898; ③ The Three People's Principles appeared in the Revolution of 1911; ④ Democracy and science appear in 19 15, so the answer is A.

Test center: the first volume of the eighth grade of the new curriculum standard "Modern Exploration and Westernization Movement"; The first volume of the eighth grade of the new curriculum standard of people's education, modernization exploration and the reform movement of 1898; The first volume of the eighth grade of the new curriculum standard of People's Education Press, Modernization Exploration and the Revolution of 1911; New Curriculum Standard of People's Education Press: The First Volume of Grade Eight Modernization Exploration and New Culture Movement