Read the following article and select the best answer. Article: 1. The family planning policy ("") was introduced in 1979 to solve the population problems. Most couples could have only one child except some special families and those in some special areas. 2. Usually, all around good student, which was called "thricegood", was given to the students who were virtuous , talented and good at PE. It was firstly used in to 1950s by Mao to encourage young people to keep fit, study well and work hard. 3. During the early 1990s, state owned company reforms were getting tough. The workers were more than the jobs in most of the cities. Many workers were losing their jobs. "Jobless" was a hot topic at that time, so the leaders hoped the laid off workers could find new jobs or start up their own business. 4. One of Deng's clever ideas, "one country, two systems", was first performed in 1997. It described Hong Kong and Macao's situation after they returned to China. This policy would also be suitable for Taiwan. There would be one China, but Hong Kong, Macao and Taiwan could have their own economies and political systems. 5. Lei Feng was a soldier who was happy to help others. He died in an accident in 1962. On March 5th,1963, Mao wrote a piece, "Learn from comrade Lei Feng", to say the Chinese should help others when necessary. After that, March 5th became a Volunteer Day. 6. The phrase "harmonious society" appeared in 2004, referring to a peaceful society where all people would work together to make the life better. This idea has become the main goal of the Chinese Communist Party now. Question: Please rearrange the events above in the correct order according to the time. - 2-1-4-3-5-6 - 2-5-4-3-1-6 - 2-5-1-3-4-6 - 2-1-5-3-6-4
2-5-1-3-4-6