Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Which of the following information is CORRECT
A．This antimicrobial property is flexible to the metal. B．E. coli bacteria are eliminated only on a dry copper surface. C．E. coli bacteria are eliminated only on a wet copper surface. D．The copper can prevent the spread of Ｅ.coli infections.