49-50The 21st Century is the century of advanced technologies. An important influence oftechnological change is the revolutionizing of communication. For example, in the past,people wrote letters or talk on phones on fixed landlines, which slowed down thecommunication process. Now they send e-mail, text or chat using mobile devices. Insteadof waiting for weeks for a letter or spending time finding a landline, we can communicateinstantly in real time or seconds after a message or email has been sent. New forms ofcommunication are cheaper or free. As a result, now people who live thousands ofkilometers away from each other can communicate as much as they want and wheneverthey want.
49. According to the passage, how do people communicate with each othernowadays?
(A) use fax
(B) send letters
(C) no communication
(D) text messages