Question

It is unlikely that we will be able to detect the signals from civilizations in other galaxies because A) signals from other galaxies will be severely weakened by distance, making them far harder for us to detect B) other galaxies are unlikely to harbor intelligent civilizations C) they will most likely transmit at wavelengths that will be absorbed by intergalactic gas D) signals from civilizations on other galaxies will not reach us before we give up listening

Answer 1

C

Step-by-step explanation:

As much as we want to, we cant underestimate potetnial life on other planets. So this all deals with communication. If there is life in other galaxies, it will take years to get responses, and even the wavelengths will be absorbed.