The answer is A. tree. The plural form of tree is trees.
Sentence:
<h3>Judy and her dog run on the beach every morning.</h3>
Hope this helps
<h2>--SirGerick--</h2>
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C is most likely the correct answer.
The correct answer is B: document/ cite sources
They both had enemies that brought negative thinking
they both had negative thoughts
either of these should suffice