C. It helps us to frame the way we see events of the past.
The answers would be good and benefit because antonym means opposite, so what's the opposite of harm, well its good of course.
No you do not. Hope that helps
you have too sight the last name of the author and the page number whether it is a quote or paraphrased. the only time you don't have to is if you include it in the sentence.
Example for when you don't have to cite in text:
On page 13 Martin says, "blah blah bah bluh bleh blah"
... otherwise just put the citation in parentheses after the quote/paraphrase like so: (Martin,13)