The effect that the phrase "ruthless and utter destruction" most likely has on readers is:
A. It causes people to think seriously about the dangers of technology.
<h3>What is Science fiction?</h3>
Scientific fiction is a genre of literature that incorporates science into an imagined plot.
When the aliens invaded the territory, they must have introduced certain technology that caused destruction. Readers will thus be prompted to think about the dangers of technology.
