Context: 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 ?
Options:
0. Because it was enough to add two or three country code digits .
1. Because automated long distance telephony services came along .
2. Because it was the beginning of a change .
3. None of the above choices .
Answer: 3