What is what cause there is no meaning for it?.
Is there a passage to go with this question? So we can have better understanding of what we should be looking for. But for a good guess, I’ll say the third one.
Tal ve que no podian comunicarse por q no habia luz
My guess on this question would be : Cold War .During Cold War USSR and USA were investing huge money in defenses and military technology to show each other they are powerful. Though its called Cold 'War' there was no war. There were no fighting. Just show.