The man is speaking with________.

A．Sever emotional stress.
B．Nutritional deficiency.
C．The death of nerve ceils in the cerebral cortex.
D．Severe head trauma.

A．Migration of large numbers of people may cause conflict.
B．The newest arrivals can hardly get good jobs.
C．Native people often resent newest arrivals because they cannot communicate easily with the latter.
D．Usually it has taken several decades for each group of newest arrivals to be accepted into the mainstream of society in the host country.