A. B, and C are teachers. One of them is a university teacher, one is a middle school teacher, and one is a primary school teacher. The university teacher has a higher education level than A. The education level of B is different from that of the primary school teacher. C low. From this we can infer:. ['A is a primary school teacher, B is a middle school teacher, and C is a university teacher.', 'A is a middle school teacher, B is a primary school teacher, and C is a university teacher.', 'A is a university teacher, B is a primary school teacher, and C is a middle school teacher.', 'A is a university teacher, B is a middle school teacher, and C is a primary school teacher.']