A. B, and C went to the restaurant for dinner. The waiter wanted to know what the three of them did, but the three provided only the following information: one of the three was an engineer, one was a professor, and one was a doctor; older than the doctor, A and Professor are different ages, and the professor is younger than B. Based on this can be launched:. ['A is an engineer, B is a professor, and C is a doctor.', 'A is a professor, B is a doctor, and C is an engineer.', 'A is a doctor, B is an engineer, and C is a professor.', 'A is a doctor, B is a professor, and C is an engineer.']