When you cite a book that you used in your research, the first item of information that you should show is the a) the author's first name b) author's last name c) the title of the book d) the number of the entry on your page

When you cite a book that you used in your research, the first item of information that you should show is B) the author's last name.

Explanation: It is highly important to cite the sources that you used in your research in order to avoid committing plagiarism and to show the reader where you got your information from. Both APA style and MLA style establish that the first item of information that must be included when quoting someone else's words is the author's last name. The styles mentioned disagree on the order of the other items, such as the date and city of publication.

a. inform

explanation:

"how to" tells us that it will explain how to, which means to inform