Notice signs at the gates of city hotels, museums, and theaters that "improperly dressed people are prohibited from entering"; no migrant workers have been seen at the hearings; financial system restrictions on lenders' guarantees or mortgages, restrictions on small deposits, and large amounts School fees keep the poor and their children out of the door. What idea does this passage support? ["At present, social exclusion is widespread in China's economic sector.", 'China s widespread exclusion of the poor in the public domain.', 'A fair society must not exclude the poor.', 'Social inequity will eventually lead to social instability.']