Now what in the world is that question
The answer would mostlikely be b
Answer:
It's a series in a list
Explanation:
The author is listing out why we remember the soldiers. Commas are used to separate these words so they are not all read at one, but they are read with a pause in between.
The passage does mention that humans are vain and proud, but it's not the main argument, rather it's used as in introduction to the other idea: that humans did not imagine life outside of earth. So this pride prevented them from imagining life outside of Earth ("beyond its earthly level")
Therefore, the best option is the following one:
<span>Pride kept humans from imagining life beyond Earth.
</span>