Answer: The complete predicate of the sentence given is:
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"depends on us" .
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It is because in the whole part of the narrative the dog was very consistent in doing the right thing and helping others such as the baby. After all his loyalty to the family, he was still accused and is hated by the people. And then the truth came and he received praises from different people.
Because you would have base your work on other authors so it is not entirely your work. you have to cite and give credit to the other authors' research information thay you used .
D because carefully is an adverb