To narrow the subject of you research. Im so very sorry if its wrong
C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.
Subordinate clauses usually begin with a subordinate conjunction or a relative pronoun.
yeah, i use a MacBook for school
i don't use PowerPoint and word
i use go ogle slides and go ogle docs
u can download PowerPoint and word on the App. Store
