A paper must include evidences form outside sources to back your central claim but it must be in restrained or limited amount as these should not end up with overpowering the key argument or quotations from internal sources. There needs to be a blend of evidence in an adequate amount that would assist to substantiate the claim and strengthen it.
As per the question, 'less than 20 percent' of your paper could be taken up by the quotes from outside sources as the rest of the 80 percent of the essay essay must be focused on providing the introduction, thesis statement and elaborating the key argument along with the evidences from internal sources, so that they together contribute an effective and thought-provoking paper. Thus, <u>option B</u> is the correct answer.
