The revision that will make the sentence more precise is this: I HAVE SOME CHANGES THAT I BELIEVE WOULD MAKE THE TRAFFIC LIGHT SYSTEM WORK BETTER.
This sentence is more precise, because it gives accurate information about the intention of the speaker. The original sentence was a little bit confusing because of the word choice of the speaker but the revised version chose the right words to express the speaker's intention.
To trudge means to "walk slowly and with heavy steps, typically because of exhaustion or harsh conditions."
Does that help?
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Im not sure but i think the correct answer is B: He has no family. Hope this helps! Can i have brainiest?