Final answer:
The Stored Communications Act prohibits accessing the communication of an organization without authorization, which is a protection under the Electronic Communications Privacy Act of 1986.
Step-by-step explanation:
The Stored Communications Act primarily prohibits the act of accessing the communications of an organization without authorization. This federal law, part of the Electronic Communications Privacy Act of 1986, is designed to protect the privacy of individuals and organizations in relation to electronic communications. Specifically, the law addresses unauthorized access to stored wire and electronic communications and transactional records. Therefore, the correct answer to the question is C. accessing the communications of an organization without authorization.