Answer:
I believe that would be an independant clause. Hope that helps!
Think about, maybe it is (D) They focused only on solving the problems & issues that had troubled their cities in the past. you see they would be focusing their city a lot because they don't what can destroy their and what can't. they have to make sure that their is no bad guys attacking their fort and that there is no problems with the way the cities were built.
hope i helped
I don’t see any incorrectly used words, it’s just a more basic sentence.
Whitney feels bad for the animals being hunted, whereas Rainsford does not have any sympathy towards the animals.