What is commonly referred to as the journalist's bible?

The correct choice is the AP Stylebook because it serves as a fundamental resource for journalists and public relations professionals, providing guidelines on grammar, punctuation, and style. Its comprehensive nature addresses the various nuances of language and format that journalists must adhere to in their writing. The AP Stylebook is particularly valued for its reliability and consistency, which are critical in maintaining professional standards in news reporting.

Many media outlets and communications professionals rely on the AP Stylebook for reference, making it an indispensable tool in the field of journalism. This is why it is commonly referred to as the "journalist's bible," as it encapsulates the essential rules and practices that govern journalistic writing and reporting. Its widespread usage and authoritative position in journalistic circles solidify its reputation as a key resource for anyone involved in media and communication.