Manners are important to happy relations among people. Everyone likes a person with good m

Manners are important to happy relations among people. Everyone likes a person with good manners. No one likes a person with bad manners. But what are good manners？ How does one know what to do and what not to do？

Well, here are some examples.

A person with good manners never laughs at people when they are in trouble. Instead, he tried to help them. He is always kind to others. When people are waiting for a bus, he takes his mm. He does not push to the front of the line. On the bus he gives his seat to an older person or a person with a very young child. If he knocks into someone, or gets in his way, he says "Excuse me" or "I"m sorry".

He says "Please" when he asks for something and "Thank you" when he receives something. He stands up when he is speaking to an older person, and he does not sit down until the other person takes his seat. He does not interrupt other people what they are talking. He does not talk too much. He does not talk loudly or laugh loudly in public.

When he is eating, he does not speak with his mouth full of food. He uses handkerchief when he sneezes or coughs. He does not spit in public.

Ideas of what are good manners are not always the same in different countries. But in all countries it is important to be kind and helpful.

A person with good manners is popular with others because______.

A．he will do what he is asked to do

B．he knows what to do and what not to do on different occasions

C．he is always saying good words to others

D．he can make others know what good manners are

请帮忙给出正确答案和分析，谢谢！