At the beginning of the change there were jet airplanes . Letting us jump from one place to another in a matter of hours . Then automated long distance telephony services came along . It was enough to add two or three country code digits and we could here somebody on the other side of the ocean .

Question: Why did jet airplanes allow us jump from one place to another in a matter of hours ?
Answer: Because it was enough to add two or three country code digits .Because automated long distance telephony services came along .Because it was the beginning of a change .None of the above choices .