According to the passage, why do people move to Canada? recertification ['ri:sɜ:tɪfɪ'keɪʃən] n. 换发新证
A.
To recertify in their skilled profession.
B.
To get a job in education or medicine.
C.
To drive taxi cabs, or cook in fast food restaurants.
D.
To escape war or religious persecution.