单项选择题

To gain the confidence of the public, companies need to tell them about the plans and activities. And there are many ways to do so. A very effective one is through speeches by officials of the company before the local chamber of commerce and various clubs. The speeches are usually reported in the newspapers and are often reprinted for distribution to government officials, educators, journalists, and others who might be interested in the company’s views. Printed pamphlets and booklets also help inform the public about a company. Motion-picture films are often used to show people something about a company.
Besides using their own public relations staffs, many companies hire independent public relations firms, which work for several clients at once. Specially trained outsiders often see trends or problems that people inside a company might miss because they are too close to the situation.
How many ways does the public relations staff of a company use to reveal its plans and activities