题目内容：
根据以下资料，回答题： Cold weather has a great effect on how our minds and our bodies work．Maybe that is why there are so many expressions that use the word “cold”．For centuries the body’s blood has been linked closely with emotions．People who show no human emotions or feelings, for example, are said to be cold blooded.
Cold-blooded people act in cruel ways．They may do brutal things to others and not by accident．For example, a newspaper says the police are searching for a cold-blooded killer．The killer murdered someone not in self-defense or because he was reacting to anger or fear．He seemed to kill for no reason and with no emotion as if taking someone’s life meant nothing．
Cold can affect other parts of the body, the feet, for example．Heavy socks can warm your feet if your feet are really cold．But there is an expression “to get cold feet” that has nothing to do with cold or your feet．The expression means being afraid to do something you have decided to do．For example, you agreed to be president of an organization, but then you learned that all the other officers have resigned．All the work of the organization will be your responsibility．You are likely to get cold feet about being president when you understand the situation.
A cold fish is not a fish．It is a person．But it is a person who is unfriendly, unemotional and shows no love or warmth．A cold fish does not offer much of himself to anyone else．Someone who is a cold fish does not offer much of himself to anyone else．Someone who is a cold fish could be cold hearted．Now a cold-hearted person is someone who has no sympathy．Several popular songs in recent years were about cold-hearted men or cold-hearted women who without feeling broke the hearts of their lovers.
“Out in the cold” means not getting something that everybody else has got．A person might say that everybody but him got a pay raise that he was left out in the cold and it is not a pleasant place to be in.
The focus of the passage is __________ . A．the meanings of expressions with “cold”
B．the influence of cold weather on our mind and body
C．why people are unhappy with cold weather
D．how some people become cold blooded
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