The national economy is an organic whole. Like a machine, each component has its own function. Its normal operation is determined by the components and the overall performance. If it is fast, it will waste the machine, and it will damage the machine if it is blind. What idea does this passage support? ['The development of the national economy must not overheat.', 'Coordinated development of the national economy.', 'The speed of national economic development must not be too slow.', 'The creation of a harmonious society depends on economic development.']