[单选题]进行水力机械设备和水工作业，工作票签发人或（ ）认为有必要现场勘察的，检修（施工）单位应根据工作任务进行现场勘察，并填写现场勘察记录。现场勘察由工作票签发人或工作负责人组织。
A.A.工作许可人
B.B.工作监护人
C.C.工作负责人
D.D.工作协调人

Advertisement can be thought of "as the means of making known in order to buy or sell goods or services". Advertisement aims to increase people’s awareness and arouse interest. It tries to inform and to persuade. The media are all used to spread the message. The press offers a fairly cheap method, and magazines are used to reach special sections of the market. The cinema and commercial radio are useful for local market. Television, although more expensive, can be very effective. Public notices are fairly cheap and more permanent in their power of attraction. Other ways of increasing consumer interest are through exhibitions and trade fairs as well as direct mail advertisement.
There can be no doubt that the growth in advertisement is one of the most striking features of the western world in this century. Many businesses such as those handling frozen foods, liquor, tobacco and medicines have been built up largely by advertisement.
We might as
A. the press
B. television
C. radio
D. all of the above