A. B, and C chose to engage in different occupations after graduation: teachers, lawyers, engineers. Other students made the following guesses: Xiao Li: A is an engineer, B is a teacher. Xiao Wang: A is a teacher, C It is an engineer. Xiao Fang: A is a lawyer and B is an engineer. It was later confirmed that Xiao Li, Xiao Wang, and Xiao Fang all guessed only half right. So, what occupations are A. B, and C engaged in? ['A is a teacher, B is a lawyer, and C is an engineer.', 'A is an engineer, B is a lawyer, and C is a teacher.', 'A is a lawyer, B is an engineer, and C is a teacher.', 'A is a lawyer, B is a teacher, and C is an engineer.']