Which of the following statements best summarizes the federal courts' rulings on internet content?

The courts have ruled that the federal government can make posting pornography online a crime.

The courts have declared that service providers are immune from suits regarding the content of material posted by others.

The courts have declared that service providers are not immune from suits regarding the content of material posted by others.

The courts have ruled that selling child pornography online cannot be outlawed because it is protected expression under the First Amendment.