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Why were the telephone, radio, and television invented?

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.
Although speech is the most advanced form of communication, there are many ways of communicating without using speech. Signals, signs, symbols, and gestures may be found in every known culture. The basic function of signal is to impinge upon the environment in such a way that it attracts attention, as. For example, the dots and dashes of a telegraph circuit. Coded to refer to speech, the potential for communication is very great. Less adaptable to the codification of words, signs also contain meaning in and of themselves. A stop sign or a barber pole conveys meaning quickly and conveniently. Symbols are more difficult to describe than either signals or signs because of their intricate relationship with the receiver's cultural perceptions. In some cultures, applauding in a theater provides performers with an auditory symbol of approval. Gestures such as waving and handshaking also communicate certain cultural messages.
Although signals, signs, symbols, and gestures are very useful, they do have a major disadvantage. They usually do not allow ideas to be shared without the sender being directly adjacent to the receiver. As a result, means of communication intended to be used for long distances and extended periods are based upon speech. Radio, television, and the telephone are only a few.
Why were the telephone, radio, and television invented?
A. Because people were unable to understand signs, signals, and symbols.
B. Because people wanted to communicate across long distances.
C. Because people believed that signs, signals, and symbols were obsolete.
D. Because people wanted new forms of communication.
Tại sao điện thoại, radio, tivi được phát minh?
A. Bởi vì con người không thể hiểu được dấu hiệu, tín hiệu và các biểu tượng.
B. Bởi vì con người muốn giao tiếp qua khoảng cách dài.
C. Bởi vì con người tin rằng dấu hiệu, tín hiệu và biểu tượng đã lỗi thời.
D. Bởi vì con người muốn những hình thức mới của giao tiếp.
Dẫn chứng: "As a result, means of communication intended to be used for long distances and extended periods are based upon speech. Radio, television, and the telephone are only a few."
Đáp án B.