The correct answer is A. A Works Cited page is required when writing a researched text.
Explanation:
A Works Cited page is a type of list added at the end of a research paper or an academical paper, in this, the author lists all sources that were used or cited during the research or paper to acknowledge other authors and allow readers to find original sources. Due to this, the works cited page is always required if the author cites other authors including paraphrasing, quoting or summarizing which is a must in research papers as the author will need to use other sources for the paper to be reliable. Thus, a "works cited" page is required when writing a research text.