单项选择题
A．they had been caught stealing salt B．they had sold salted fish C．they had taken salt from the king' s table D．they had used salt to preserve dead bodies
A．Nobody Knows When Salt Began to Be Used B．The Uses and Importance of Salt in History C．Thousands of People Were Punished Because of Salt D．Salt Was Important in History
A．to punish people who had broken the law B．to keep dead bodies from decay C．to keep fish alive D．to make chemicals