Final answer:
The correct MLA in-text citation is option C: This point has been argued before (Frye 197), which correctly excludes commas, the word 'page', and includes the period after the citation.
Step-by-step explanation:
The correct MLA in-text citation that uses proper punctuation is: This point has been argued before (Frye 197). This corresponds to option C. In MLA format, in-text citations should include the author's last name and the page number without a comma and without 'p.' or 'pg.' before the page number. The period should come after the parenthetical citation. Additionally, there is no need to use the author's first name in the in-text citation unless you are citing works by two different authors with the same last name.