A. A form of communication that interrupts the environment.
B. The most difficult form of communication to describe.
C. A form of communication which may be used across long distances.
D. The form of communication most related to cultural perception.
Đáp án : A
Interrupt = làm ngắt quãng, xen vào ≈ impinge upon something . Dòng 3: basic function of signal is to impinge upon the environment in such a way that it attracts attention
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