The City of Ladue passed an ordinance prohibiting all yard signs. The stated purpose of the law was to "prevent ugliness, visual blight, and clutter"...

The City of Ladue passed an ordinance prohibiting all yard signs. The stated purpose of the law was to "prevent ugliness, visual blight, and clutter" in the city. A woman opposed to the Gulf War put up a political sign in her yard and was told by the city to remove it. She sued the City of Ladue on First Amendment grounds, contending that her freedom of speech was being unlawfully infringed by the city's ordinance. PLEASE ANSWER BOTH OF THE FOLLOWING: 

A. The US Supreme Court identifies three types of speech under the First Amendment. Which type of speech is involved in this case? 

B. What does a city or other governmental entity (like Ladue in this case) have to show in this type of case in order for a court to find that its restrictions are justified