
Passage: Homesteads in rural my country are collectively owned and can only be used by farmers and cannot be bought, sold, leased or inherited. The homestead system guarantees the survival rights of farmers. The houses built by the farmers on the homestead are the assets of the farmers. If farmers are allowed to sell their houses, they are actually allowed to sell the right to use the homestead. If the right to use the homestead is bought by someone else, it will damage the survival rights of farmers. But if farmers are not allowed to sell their houses, it will infringe on farmers' asset rights.
Question: If the above statements are true, which of the following statements must be true?
A. A.Houses built by farmers on homesteads do not have property certificates.
B. B.If migrant workers have purchased housing in cities, they should no longer occupy homesteads in their rural hometowns.
C. C.If the rights and interests of farmers' survival are not damaged, the rights and interests of farmers' assets will be violated.
D. D.For the vast majority of migrant workers, the homestead and responsible land in their rural hometown is their last guarantee of survival.
Answer: