The correct answer is A. A blogger publishes secret national security information.
Step-by-step explanation:
In the United States, freedom of speech is an important right protected by the First Amendment and many local or minor laws. This includes protection to individuals for communicating facts and information to the general public, conveying their opinion about issues, and using media to communicate without being restricted or punished.
However, this right has some limitations such as using freedom of speech to hurt others or reveling information related to national security as this can threaten certain aspects of general society. This implies the activity that is not protected by the constitutional right of free expression is "A blogger publishes secret national security information" because this activity is related to national security information.