The writer offered ______ examples to support his argument.

A．The Eskimos do not suffer from colds all the time.
B．Colds are caused by cold.
C．People suffer from colds just because they like to stay indoors.
D．A person may catch a cold by touching someone who already had on

A．they are working in the isolated arctic regions
B．they are writing reports in terribly cold weather
C．they. are free from work in the isolated arctic regions
D．they are coming into touch again with the outside world