Which of the following pair of sentences explains how long-distance telephone calls have changed thanks to the technological advancements created during the Cold War?

Before the Cold War, you could only dial long distance with a landline. Now, you can use any telephone device you want.

Before the Cold War, long-distance telephone calls were only possible for the military. Now, anyone around the world, whether civilians or military personnel, can make long-distance telephone calls.

Before the Cold War, only one in three houses had the capability to make long-distance phone calls. Now, long-distance phone calls are routed through satellite systems.

Before the Cold War, you had to dial operators and ask them to put a long-distance call through. Now, there are a variety of electronic devices that can make long-distance calls via satellite technology.