・Look at the article below about effective communication and the questions over the page.・For each question (13-18) , mark one letter (A, B, C or D) on your Answer Sheet for the answer you choose.According to the writer, the best way of achieving effective communication is to A．adapt the message to suit a particular audience.B．make the content of messages brief and direct.C．select the most suitable means of conveying a particular message.D．ensure that information is targeted at the appropriate group of people.