Cliff dwellers who disappeared mysterious

When would the government be allowed to limit what people say? a. the government may prevent individuals from engaging in "hate speech" b. the government may prevent individuals from engaging in "symbolic speech" c. the government may prevent entertainers from using foul language d. none of these are examples of permissible limitations on the freedom of speech

What does this quotation from the introduction of thedeclaration of independence do?

Where is sub-saharan africa located?