A) is incorrect. "Couldn't" and "more" should not be in the sentence. B) is incorrect. "Couldn't" does not fit in the sentence. C) is correct. The sentence makes the most sense than the others. D) is incorrect. "More" does not fit in this type of sentence.
It says that he “wrote his own version”, so if he wrote it in his own words and didnt type word for word of what the other person wrote down, then no, that is not plagiarism.
Birthday is the subject of the sentence. This is because t<span>he subject of a sentence is the person, place, thing, or idea that is doing or being something.</span>
