Answer: C. Hartford, George. Daylight Saving: Pros and Cons. Bubbleberry Publications, 1987.
Explanation:
There are many different citation styles we can use when writing articles or academic/research papers (APA style, Chicago, MLA, etc.) According to MLA citation format, the form for a book citation is the following:
Last Name, First Name. Title of Book. City of Publication, Publisher, Publication Date.
In this particular case, as no information about the city of publication is given, it is omitted in the citation as well. The correct way for Zayn to cite the book is:
Hartford, George. Daylight Saving: Pros and Cons. Bubbleberry Publications, 1987.