A、They were excused from paying income tax. B、They were given some silver and gold coins by the ruler. C、They tried to collect m

A friend of mine told me that when he was a young man, [16] he went to work as a teacher in one of the states of India. One day, he received an invitation to dinner at the ruler’s palace. Very pleased, he went to tell his colleagues. They laughed, and told him the meaning of the invitation. They had all been invited, and [17] each person who was invited had to bring with him a certain number of silver and gold coins. The number of coins varied according to the person’s position in the service of the government. My friend’s income was not high, so he did not have much to pay. [17] Each person bowed before the ruler, his gold went onto one heap his silver went onto another heap. And in this way he paid his income tax for the year. This was a simple way of collecting income tax. The tax on property was also collected simply. The ruler gave a man the power to collect a tax from each owner of land or property in a certain area, if this man promised to pay the ruler a certain amount of money. [18] Of course, the tax collector managed to collect more money than he paid to the ruler. The difference between the sum of money he collected and the sum of money he gave to the ruler was his profit.
Questions 16 to 18 are based on the passage you have just heard.
16. What do we know about the speaker’s friend?
17. What was the real purpose of the ruler’s invitation?
18. What does the passage say about the tax collectors?