Final answer:
An in-text citation should contain the author's last name and the page number. The exact format can vary depending on the citation style such as MLA or APA, but the author and specific location of the sourced information are essential.
Step-by-step explanation:
The correct content for an in-text citation typically includes the author's last name and the page number from which the information was sourced. Therefore, the correct answer to the question is (1) Author's last name and page number. The purpose of an in-text citation is to provide a brief reference that points the reader to the more detailed citation on the Works Cited page or references list. For example, an in-text citation for a single author source would appear in an essay as (Smith 21), where “Smith” is the author's last name and “21” is the page number where the referenced information is found.
When using the MLA citation style, the basic format for a book entry on the Works Cited page starts with the author's last name, followed by the first name and a period. The book's title is then presented in italics, followed by the publisher, the year of publication, and a period. In APA citation style, the format would include the author's last name followed by initials, the publication date, the title of the work, and the publisher, including DOI or URL for articles.