下列属于行政主体承担行政责任具体方式的是()。
Paragraph Four
Beginning in the 1980s, higher incomes and greater job opportunities in China’s large cities have been enticing growing numbers of farmers into becoming migrant workers. Currently, the migrant population has reached an unprecedented level. About 200 million farmers have left their homes to earn a living in cities.
In China the population is drifting from r______ areas into cities.